What Does Chlorine Do In a Pool? How Does Chlorine Work in a Pool? (Chemistry Explained) What Does Chlorine Do To Your pH Level? Chlorine Kills the …Chlorination is the process of adding chlorine to drinking water to kill parasites, bacteria, and viruses. Different processes can be used to achieve safe levels of chlorine in drinking water. Using or drinking water with small amounts of chlorine does not cause harmful health effects and provides protection against waterborne disease outbreaks.Use 7 oz. of Aqua Silk Oxidizer (27% hydrogen peroxide formula) per 10,000 gallons of pool water to lower chlorine level by 3.0 ppm. For spas and smaller bodies of water, use 1 oz. of 3% drug store grade hydrogen peroxide per 100 gallons of spa water to lower chlorine (or bromine) levels by about 5 ppm.Each 20kg bag of salt equals roughly 500ppm for 60,000L pools. Clean your salt cell (give it an hydrochloric acid bath in 10% acid 90% water for 3-5 minutes until majority of the calcium bubbles up and dissolves). Replace your Chlorinator Salt Cell. Replace your C hlorinator. Use granulated chlorine instead of liquid chlorine and add 1-2 cups ...It’s awards season, and there’s no better award than beating all of your friends at predicting the Oscar winners. So here’s how to win your Oscars pool every year, and get you feel...The standard free chlorine range in pool water should be between 1.0 and 3.0 parts per million (ppm). This range ensures effective disinfection while providing a comfortable swimming environment. When the free chlorine levels drop below 1.0 ppm, it poses potential health risks and can indicate a compromised sanitation state.Liquid Chlorine is a 10-12.5% solution of Sodium Hypochlorite and offers the following advantages as a Shock: High concentration of Available Chlorine (AC) Being in liquid form it mixes and disperses fast. Does not raise the Cyanuric Acid (CYA) level of the pool. Does not increase the Calcium Hardness (CH) level.Chlorine. Chlorine: Proper Range is 1.0-3.0 PPM Chlorine level should be kept at approximately 1.5 PPM to effectively disinfect your pool water, killing bacteria and algae. Your pool may need to be super-chlorinated or shocked once or twice a month, more often in extremely hot weather to keep suntan oils from interfering with chlorine ...The total chlorine level is the sum of the free chlorine and combined chlorine levels in the pool. For a healthy pool, the free chlorine level should be between 1.0 and 3.0 parts per million (ppm). The Centers for Disease Prevention and Control recommends pH 7.2–7.8 for pools and hot tubs. Keeping the pH level in this range …Chlorination is the process of adding chlorine to drinking water to kill parasites, bacteria, and viruses. Different processes can be used to achieve safe levels of chlorine in drinking water. Using or drinking water with small amounts of chlorine does not cause harmful health effects and provides protection against waterborne disease outbreaks.There’s less electricity and energy involved in maintaining a chlorine pool. Easy to DIY. While you can hire a professional to work on your chlorine pool, it is easy to do a lot of minor repairs yourself. Cons Higher Chlorine Levels Can be Harsh. Chemicals like chlorine can be harsh on your eyes and skin. More Ongoing Maintenance2. Run the pool pump at all times if possible. Properly circulating the water is essential for maintaining the chemistry in your pool. Let the pump run continuously so the water stays clean and chemicals like chlorine are evenly dispersed. If you can’t keep the pump on all the time, run it at least 10 hours per day.Pooled investment vehicles allow multiple small investors to invest on a large scale. They can include everything from mutual funds to hedge funds. Calculators Helpful Guides Compa... Testing pool chlorine is an important part of keeping the pool water sanitized and clean and for health and safety of swimmers. Proper pool water sanitation minimizes microorganism growth in the pool water. Although not a safety issue, clean, clear, and inviting pool water is an added benefit to a properly maintained chlorine level in pools. Nov 28, 2023 · How to Lower Chlorine Levels In Your Pool Fast. Depending on the pool’s chlorine level, you can use different methods to lower it. Below are the seven most effective ways to reduce the chlorine level in your pool to get in that 3 ppm sweet spot. 1. Use the Sun. Using sunlight is the easiest way to regulate chlorine levels in your pool. Free chlorine (FC) is the unused, active, and ready-to-sanitize chlorine you typically measure when testing your residual chlorine level. This is the most effective form of chlorine in terms of sanitizing and oxidizing power, and arguably the most important chemical parameter of any pool.A pool with 10,000 gallons of water requires one or two 3-inch chlorine tablets per week to maintain the recommended 1 to 3 parts per million. Test pool water regularly, and adjust...The correct level of pH in a swimming pool should be between 7.4 and 7.8, with 7.6 being the ideal level. 2. Monitor pH and Total Alkalinity. The level of pH in pool water affects how all other chemicals function, including chlorine. When pH level gets too high, chlorine will become ineffective, and we all know how important chlorine is in a …I bought this house over the winter with a slighlty neglected pool with green water and a lot of leaves on the bottom. I have removed all debris, filter up and running. Cya about 100, …This step by step guide will teach you how to shock a pool and keep your pool chlorine level stable. Here's how to shock your pool in six easy steps. Step 1. Protect yourself. Gateway Safety 6966 Cover2 Safety Glasses Protective Eye Wear - Over-The-Glass (OTG), IR Filter Shade 5.0 Lens, Black Temple.Liquid Chlorine is a 10-12.5% solution of Sodium Hypochlorite and offers the following advantages as a Shock: High concentration of Available Chlorine (AC) Being in liquid form it mixes and disperses fast. Does not raise the Cyanuric Acid (CYA) level of the pool. Does not increase the Calcium Hardness (CH) level.Liquid Chlorine is a 10-12.5% solution of Sodium Hypochlorite and offers the following advantages as a Shock: High concentration of Available Chlorine (AC) Being in liquid form it mixes and disperses fast. Does not raise the Cyanuric Acid (CYA) level of the pool. Does not increase the Calcium Hardness (CH) level.I bought this house over the winter with a slighlty neglected pool with green water and a lot of leaves on the bottom. I have removed all debris, filter up and running. Cya about 100, …Everyone loves swimming pools, but not everyone loves owning a pool. This article looks at a swimming pool and its impact on the resale value of your home. Expert Advice On Improvi...In brominated systems, the minimum disinfection level needed is a combination of the current bromine level plus the minimum free chlorine level for the disinfection time selected. Maintain the free chlorine at 20 ppm 2 and pH at 7.5 or less for at least 12.75 hours to achieve a concentration x time (CT) inactivation value 3 of 15,300 to inactivate …Dec 15, 2016 · The total chlorine level is the sum of the free chlorine and combined chlorine levels in the pool. For a healthy pool, the free chlorine level should be between 1.0 and 3.0 parts per million (ppm). The Centers for Disease Prevention and Control recommends pH 7.2–7.8 for pools and hot tubs. Keeping the pH level in this range helps prevent ... Commercial pools should run their chlorine levels at 3 -5 ppm as their bather load is usually much higher. Anything between 5-10 ppm is still safe to swim, but you are risking damage to equipment and certainly complaints from swimmers. Some experts recommend no swimming unless the chlorine is 8 ppm or less. Mar 20, 2023 · Step 1: Collect a sample of pool water in a clean container. Step 2: Add the reagents from the liquid test kit to the water sample according to the instructions. Step 3: Swirl the water and reagent mixture to ensure it is well mixed. Step 4: Compare the color of the water to the color chart provided with the test kit. The chlorine levels in your swimming pool should always be maintained between 1.0 and 3.0 parts per million. These levels will keep your water safe and clean. There are many ways that you can choose to add chlorine to your swimming pool water. Using testing kits can make it easier to keep your chlorine levels stable, but there are …The goal is to have a chlorine level at 1 to 3 parts per million (ppm). The packaging for your chlorine should explain how much to add to raise the level by 1 ppm …For swimming pools and spa tubs, the U.S. Environmental Protection Agency (EPA) recommends a maximum chlorine level of 4 parts per million (ppm). The Centres for …Phosphates are a food source for algae and other aquatic plants. This is why high phosphate levels are one of the factors for having algae in your pool. However, some phosphate in your pool isn’t necessarily going to cause algae growth. Research shows that you need 1,000 parts per billion of phosphate in your pool to really support algae growth.Jul 30, 2022 · 4. Dilute the pool with more (unchlorinated) water. Just like when you pour yourself a refreshing glass of cordial, adding more water to the vessel can help to weaken the strength of the pool bleach. Use your hosepipe to top up your H2O with cold water, and test the pH with your test strips (available from Amazon) . Total chlorine is really just a means to an end, with the end being to find the combined chlorine level. From a pool maintenance perspective, it’s not a particularly useful metric by itself. With that said, if you take the total chlorine and remove your free chlorine level, you’re left with your combined chlorine (TC – FC = CC).Communities across the U.S. are still recovering from the pandemic. Luckily, many are offering grants to support their small business community. Communities across the U.S. are sti...Apr 28, 2022 · Tip 2: Ditch the pool cover (when sunny) Tip 3: How to lower chlorine in pool quickly. Tip 4: Use sodium thiosulfate. Tip 5: Turn up the temperature. Tip 6: Add pool grade hydrogen peroxide. Tip 7: Drain the swimming pool. Tip 8: Spend some time in the pool. Alternative pool sanitizers. Feb 17, 2023 · Chlorine’s primary role in a pool is to disinfect the water by attacking organic and inorganic compounds it comes into contact with. Without chlorine, your swimming pool would be a breeding ground for microscopic contaminants such as bacteria, viruses, parasites, and algae – making the water extremely hazardous to humans. Adding granular chlorine to pool. High combined chlorine levels in a swimming pool can be lowered by shocking the pool, using enzymes, installing a UV or ozone system, and reducing sources of ammonia. Additionally, the pool should have a pH of 7.4 – 7.6 and cyanuric acid (stabilizer) levels of 30 – 50 ppm.If chlorine levels are higher than 4.0 parts per million (ppm), there are a few ways you can lower the level of chlorine in your pool: Expose the Water to Sunshine An easy (and free!) way to dissipate chlorine in your pool is to let good ol’ Mother Nature do the work.Swimming is one of the most popular forms of physical activity. Pool water is cleaned with chlorine, which - in combination with compounds contained in water - could form chloramines and trichloromethane in the swimmer’s lungs. The aim of the present study was to examine the effect of swimming training in an indoor pool on the composition of …FIDELITY FREEDOM BLEND 2025 CMGLD POOL V- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksMar 25, 2023 · The recommended chlorine level for a pool is between 1 and 3 parts per million (ppm). This level is necessary to kill harmful bacteria and prevent algae growth. However, it’s important not to exceed 5 ppm, as high chlorine levels can be harmful to swimmers. 3. Calculate your pool’s volume if you don’t already know it. You’ll need to know how much water your pool holds in order to determine the right amount of chlorine to add. For a quick estimate, measure your pool’s length and width, find the average depth, then multiply length by width by the average depth.Ideally, bromine levels should be between 3-5 ppm. Adjust the levels as needed to maintain the appropriate level. Clean the filter: A dirty or clogged filter can hinder the flow of water, causing the bromine to build up in your pool. Clean your filter regularly to ensure proper water flow and prevent bromine build-up.The level of free chlorine should be between 2 to 4PPM as it keeps the water sanitized. There are two ideal ways to check the pool chlorine, test kits, and test strips. The test kits are mostly used by professionals like the ones at Gilbert Pool Service. Here are the two ways to measure chlorine levels in a pool:Apr 29, 2021 · Chlorine: Proper Range is 1.0-3.0 PPM Chlorine level should be kept at approximately 1.5 PPM to effectively disinfect your pool water, killing bacteria and algae. Your pool may need to be super-chlorinated or shocked once or twice a month, more often in extremely hot weather to keep suntan oils from interfering with chlorine effectiveness. Are you a fan of the popular game 8 Pool and looking to enhance your gaming experience on your PC? Look no further. In this article, we will guide you through the ultimate 8 Pool P...Jul 30, 2022 · 4. Dilute the pool with more (unchlorinated) water. Just like when you pour yourself a refreshing glass of cordial, adding more water to the vessel can help to weaken the strength of the pool bleach. Use your hosepipe to top up your H2O with cold water, and test the pH with your test strips (available from Amazon) . Jul 17, 2023 ... When you're taking steps to maintain a stable pH value in your pool water, make sure you keep pH levels between 7.4-7.5, which is just above ...Aug 5, 2017 ... For example, if the measured cyanuric acid in a swimming pool is 30, then a pool operator should maintain a minimum free chlorine level of 2.25 ...The level of sanitizer in your pool or spa water is called "free available chlorine or bromine”. The recommended minimums are: 1-3 ppm for residential pools, including inflatable pools. 3-5 ppm for residential spas and hot tubs. for commercial pools and spas, follow provincial and/or municipal regulations.The correct level of pH in a swimming pool should be between 7.4 and 7.8, with 7.6 being the ideal level. 2. Monitor pH and Total Alkalinity. The level of pH in pool water affects how all other chemicals function, including chlorine. When pH level gets too high, chlorine will become ineffective, and we all know how important chlorine is in a … Ideal chlorine levels for swimming pools range from 2-4 parts per million (ppm). At these levels, chlorine is capable of killing off potentially threatening bacteria and algae without being harmful to swimmers. Causes Of High Free Chlorine In Pools. If you have high free chlorine levels in your pool, there are a few possible causes. Ideal Salt Levels For Your Pool. Typically, the ideal level of salinity for a saltwater pool falls between 2,700 - 3,400 parts per million (ppm), with the sweet spot being around the 3,200 ppm mark. In a salt water pool, the ideal salt levels can vary slightly, especially if your saltwater chlorine generator has its own requirements.1. Chlorine Tablets. Chlorine tablets are typically used with a dispenser that allows them to be released into your pool consistently over time. This makes it the easiest form of chlorine to use, and the one we …Fewer Harsh Chemicals. One of the major benefits of saltwater systems is that they have significantly lower levels of chlorine than traditional chlorine systems and don’t require harsh chemicals. As a result, the water is gentler on your skin, eyes and hair, and it does not fade swimwear or towels the way that chlorine pools do.Feb 23, 2018 · Free Available Chlorine: 2.0–4.0 ppm; pH Chart. Use this pool pH dosage chart to determine how to properly adjust the pH level in your pool. A low pH of 7.1 is desirable when using chlorine and sock, but 7.4 is best for swimmer comfort, surface protection, and overall water balance. Lowering pH with pH Reducer The amount of baking soda needed to lower the chlorine levels in your pool depends on the size of your pool and the level of chlorine present. A general rule is to add 1.5 pounds of baking soda per 10,000 gallons of water to reduce the chlorine levels by 10 ppm (parts per million). However, it’s always best to consult with a professional or ...So, once you’ve calculated the level of combined chlorine in the pool, you will have to add about 10 times that amount of free chlorine to get rid of it using the superchlorination method. 2. Apply a Non-Chlorine Shock. Non-chlorine shocking is the process of adding more oxidizer to the water that is not in chlorine form.Apr 29, 2021 · Chlorine: Proper Range is 1.0-3.0 PPM Chlorine level should be kept at approximately 1.5 PPM to effectively disinfect your pool water, killing bacteria and algae. Your pool may need to be super-chlorinated or shocked once or twice a month, more often in extremely hot weather to keep suntan oils from interfering with chlorine effectiveness. To lower the chlorine level of a saltwater pool, reduce the output from the chlorinator, chlorine feeder, or chlorine generator. If your pool doesn’t have any of these, remove any chlorine tablets or chlorine floaters from the water. To further lower the chlorine level, you can swap out 25% of the water for freshwater or add chlorine ...This is a complete beginner’s guide to pH in your pool, what it means, why it’s important, how it works, and how to adjust it. Quick answer: Your pH level indicates how acidic or basic your pool water is, impacing everything from chlorine effectiveness to water clarity. Keeping your pH level between 7.2 and 7.8 is recommended.Mar 13, 2018 · 1Dip some water out of your pool. Your test kit will come with some sort of water collector. It’s usually a plastic container that holds water in the middle and has numbers on the side that will give you a reading of the levels. 2Add reagent. The kit comes with a reagent that you add to the water. The steps below are based on the Pentair cyanuric acid liquid test kit, otherwise known as the black dot test kit. Here’s how to test cyanuric acid in a pool using a liquid test kit: 1. Fill the Tube up to Line A. Using the provided tube, take a small water sample from the edge of your pool. If your pool water happens to be dirty or cloudy ...The Chlorine and Baking Soda Conundrum. To put it simple, NO, baking soda cannot lower the chlorine level in your pool. Despite baking soda’s numerous uses, it doesn’t have the ability to do this. In fact, baking soda is primarily used to balance the pH and alkalinity of pool water, not alter the chlorine levels.Jun 8, 2021 · First, if you have a saltwater chlorine generator or chlorine feeder, turn it off. And take any chlorine tablets out of the pool floater or skimmer while you wait for the levels to go down. 2. Let the sun burn off some of the chlorine. A few hours of direct sunlight can reduce your chlorine levels by up to 90 percent. Chlorine shock treatment is the easiest way to raise the chlorine levels in a pool. Follow the instructions for the shock treatment you intend to use as well as the dosage required for the quantity of water in your pool. Once the chlorine level is raised between 1 and 4 parts per million, it will need to be maintained.Jun 23, 2022 · This means that none of the combined chlorine has been used, which means the water should be clean. Another way to figure out the combined chlorine level is to subtract the total chlorine level from the free chlorine level, provided the total chlorine is higher than the free chlorine. Apply the formula F - T = C. Short Summary. It is essential to regulate chlorine levels in a pool between 1-3 ppm, as levels exceeding 5 ppm can be hazardous. Swimming in a pool with high …The standard free chlorine range in pool water should be between 1.0 and 3.0 parts per million (ppm). This range ensures effective disinfection while providing a comfortable swimming environment. When the free chlorine levels drop below 1.0 ppm, it poses potential health risks and can indicate a compromised sanitation state.Are you a fan of eight ball pool games? Whether you’re a beginner or an experienced player, finding the right game that matches your skill level can greatly enhance your enjoyment ...Pool landscaping doesn’t have to cost an arm and a leg. Here are some affordable ideas. Expert Advice On Improving Your Home Videos Latest View All Guides Latest View All Radio Sho... Ideal chlorine levels for swimming pools range from 2-4 parts per million (ppm). At these levels, chlorine is capable of killing off potentially threatening bacteria and algae without being harmful to swimmers. Causes Of High Free Chlorine In Pools. If you have high free chlorine levels in your pool, there are a few possible causes. Normal pool chlorine levels range between 1.0 and 3.0 parts per million (ppm), depending on the amount of stabilizer in the water (higher levels create higher … Testing pool chlorine is an important part of keeping the pool water sanitized and clean and for health and safety of swimmers. Proper pool water sanitation minimizes microorganism growth in the pool water. Although not a safety issue, clean, clear, and inviting pool water is an added benefit to a properly maintained chlorine level in pools. Chlorine. 2 – 5 ppm. 1 – 5 ppm. pH. 7.4 – 7.6. 7.2 – 7.8. Chlorine and pH work hand in hand to disinfect your swimming pool. Even if you have the right chlorine level, but the pH level is too high, the water can still be unsafe to swim in. This is because chlorine loses its effectiveness in acidic water.Mar 20, 2023 · Step 1: Collect a sample of pool water in a clean container. Step 2: Add the reagents from the liquid test kit to the water sample according to the instructions. Step 3: Swirl the water and reagent mixture to ensure it is well mixed. Step 4: Compare the color of the water to the color chart provided with the test kit. Jul 17, 2023 ... When you're taking steps to maintain a stable pH value in your pool water, make sure you keep pH levels between 7.4-7.5, which is just above ...Apr 24, 2018 · If free chlorine falls bellow one part per million, the pool is unsafe to swim in. Combined chlorine is the fraction of the total chlorine that has reacted with organic matter, such as algae and bacteria; basically, it's the used chlorine. High levels of combined chlorine can show that there are too many unwanted invaders in the pool, but free ... There’s less electricity and energy involved in maintaining a chlorine pool. Easy to DIY. While you can hire a professional to work on your chlorine pool, it is easy to do a lot of minor repairs yourself. Cons Higher Chlorine Levels Can be Harsh. Chemicals like chlorine can be harsh on your eyes and skin. More Ongoing MaintenanceJul 31, 2023 · Once your pool is free of debris and your other levels are balanced, it’s time to shock your water. When you shock your pool, you’re adding enough chlorine to reach a “chlorine breakpoint.”. This raises your pool’s free chlorine levels to 10 times or more over the normal amount.
Shocking your pool can remove all types of algae from your pool, but it is an extensive process: Sanitize: Sanitize your pool with a heavy treatment of chlorine. Granular or liquid non-stabilized chlorine works best. Adjust pH levels: Lower your pool’s pH with hydrochloric acid, pH-down tablets, or baking soda.. Moving pods movers
Analysis from the Economic Policy Institute suggests that women and hispanic workers have the most to lose from the Department of Labors proposed tip-pooling rule. The US Departmen...Testing the chlorine level is one of the easiest pool tests you can do. Multiple companies make test strips that are easy to do and only take a few minutes to perform the test. More expensive test strips are available that can test total chlorine as well as free chlorine.Chlorine test kits are also readily available.. Also Check: How To Lower Cya …2. Use a Chlorine Neutralizer. If your chlorine level is really high or you just don’t have the luxury of time, consider adding a chlorine neutralizer to your water. This is exactly what it sounds like; a chemical that reacts with chlorine, breaking it down and effectively rendering it useless.Chlorine is safe when used and maintained correctly. When it dips below its recommended levels, it can allow nasty and potentially harmful bacteria to thrive in your pool. But it can also be dangerous when it’s used too heavily. So yes, it’s a problem when your pool’s chlorine levels are too high.Mar 21, 2021 · Liquid chlorine is typically the cheapest option and is poured directly into the pool, but with pH level of around 13 it does require careful balancing of your pool water which can increase costs. This is a popular option for larger, commercial pools because it can be quickly added in large quantities. Thanks to year-round sunny skies, most Orlando hotels have pools where you can cool off after (or in lieu of) your Florida adventures. Before choosing your hotel, check out these t...The three main reasons to shock a pool are: 1) to get rid of algae, 2) to remove bacteria, and 3) to break up chloramines. Non-chlorine shocks like potassium monopersulfate (MPS) are an excellent alternative to normal chlorine shocks. Non-chlorine pool shocks encourage disinfecting, don’t impact chlorine or calcium levels, …Mar 14, 2023 · Now that you understand the importance of chlorine levels in your pool, you may be wondering what the recommended range of chlorine levels is. The Centers for Disease Control and Prevention (CDC) recommends that the free chlorine level in residential pools be between 1 and 3 parts per million (ppm). 2. Run the pool pump at all times if possible. Properly circulating the water is essential for maintaining the chemistry in your pool. Let the pump run continuously so the water stays clean and chemicals like chlorine are evenly dispersed. If you can’t keep the pump on all the time, run it at least 10 hours per day.Pooled investment vehicles allow multiple small investors to invest on a large scale. They can include everything from mutual funds to hedge funds. Calculators Helpful Guides Compa...The free chlorine level in a swimming pool is usually between 1 - 3 ppm (parts per million). This level helps prevent bacteria from building upon the pool’s surface and protects against pathogens such as Cryptosporidium or Giardia. Health problems associated with chlorinated pools.Mar 20, 2023 · Step 1: Collect a sample of pool water in a clean container. Step 2: Add the reagents from the liquid test kit to the water sample according to the instructions. Step 3: Swirl the water and reagent mixture to ensure it is well mixed. Step 4: Compare the color of the water to the color chart provided with the test kit. The Bottom Line. How High is Too High? The recommended free chlorine level for most pools is somewhere between 2 and 3 parts per million (ppm), but it’s …The fastest way to lower your swimming pool’s chlorine level is to use a chemical called Sodium Thiosulphate. Thiotrine is a popular brand. Follow the label’s instructions and your chlorine will be lowered in a matter of hours. It could take longer depending on the size of the pool and how high the chlorine level is.1. Chlorine Tablets. Chlorine tablets are typically used with a dispenser that allows them to be released into your pool consistently over time. This makes it the easiest form of chlorine to use, and the one we …To fix this problem, you’ll need to add salt. It’s recommended that your pool’s salt level should be at 5,000 ppm. Just remember that for a 16,000 gallon pool, a 44 lbs bag of salt comes out to about 500 ppm. Another reason your chlorine level may always be low is because your salt cell needs a good cleaning.Swimming in a pool with too much chlorine can be unsafe, causing skin, eye, and respiratory irritation. Safe chlorine levels range from 1-5 ppm. High levels, above 4 ppm, can lead to discomfort and health risks. Excess chlorine can be lowered by stopping chlorine addition, using sunlight exposure, diluting with fresh water, or adding chlorine ... Measure the amount of total chlorine in the water. Measure the amount of free chlorine in the water. Subtract the free chlorine number from the total chlorine number: combined chlorine = total chlorine – free chlorine. Get rid of chloramines in the water, especially when the combined chlorine level is too high (for example, more than 0.4 ppm). .