6 IMPORTANT steps for Clear a Green Pool

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6 IMPORTANT steps for Clear a Green Pool

How to clear a green pool? Your swimming pool turns green due to algae, which is made possible by a chemical imbalance. Algae will struggle to grow in a pool with adequate free chlorine present. Algae will spread if the chlorine can’t just build up to a sufficient level for some causes. With the completion of the six-step procedure outlined below, you can easily clean your green pool with chlorine. 

Algae Invades Pools:

A green pool is frequently the result of insufficient water testing and sanitizing, which is a simple but bothersome cause. You let your little green foe in when the sanitizer and chlorine levels in your pool are below acceptable levels or when the chlorine gets mixed up with other chemicals there. 

The sanitizer eliminates the algae in the pool and makes it uninhabitable for it. You run the risk of developing algae in your pool if you don’t test frequently enough and don’t add enough chlorine or bromine. Your pool may require additional testing because of several factors that increase the likelihood of algal blooms. 

How to Clean a Green Pool in Six Steps: 

Analyze the water’s chemistry to see if it can be changed or if it is too late. 

  • To evaluate the pH balance, examine the water. 
  • Shocking the Pool 
  • To maintain balance, pump the pool. 
  • Reclean and filter the pool. 
  • sustain balanced chemistry. 

The details of each of these steps are provided below. All data for clearing the green pool is based on a typical 12 to 14 thousand-gallon in-ground swimming pool. 

  • Drain and Acid-washed: 

These six methods won’t work if the water is too green; instead of shocking the swimming pool, you might need to pump it and acid-wash it. Several pools that I have seen were not just green but also black. Even though it takes money to replenish the pool, in extreme situations like these, it is more practical and efficient to just empty the pool and have it acid-washed. 

If you can see at least eight to ten inches below the surface of the water, the pool can be cleaned by using chemicals. If not, the pool must be drained. Firstly, the staircase down into the pool is visible in the picture below as an illustration. We can continue once we’ve determined that the swimming pool doesn’t need to be drained and can instead be treated chemically.  

  • Test the Water: 

Checking for chlorine is not very necessary because if the pool is green, there is little to no chlorine in the pool and you will be adding a lot if you are going shocked. However, you should do a pH test as a shock will cause the pool to become clouded if the pH is high. A pool that has been shocked will already be cloudy unless all of the dead algae as well as other solids have been filtered out, but a pool with a high pH will be extremely murky. 

I want to use a high-end test kit to determine pH, although inexpensive test strips will at least give you a general notion of whether your pH is low or high. You would prefer it to be low, at least 7. Add 1 gallon of (muriatic acid) if the pH is high; this should be sufficient. The pool can be a little acidic (low pH) for swimming yet still be at a suitable pH for shocking. After 5 hours of circulation, recheck the pH for clearing the green pool

  • Shocking the Pool: 

Instead of buying separate one-pound bags from pool businesses or big-box retailers, buy 25 pounds container of granulated chlorine. You will save a ton of money, and you will occasionally need chlorine in little amounts in the future. Use ten gallons of liquid chlorine or six pounds of powdered shock. 

Once all ten gallons of fluid chlorine or the six pounds of shock have been used, turn on the filter pump and spread the chlorine equally over the water to cover the whole pool surface. Use a decent algaecide as well, which you can add just a few hours after the water has been circulated. The dead algae particles can now be made to cluster together by adding a flocking agent. 

  • Pumping and Filtering: 

DE Filter: 

Use new diatomaceous earth powder. Run the pump for about 24 hours. While this pumping is occurring, be sure that leaves not block the swimming pool to drain. Use a brush over the general area of the main drain at the surface area of the swimming pool if the water is so green that you are unable to see it. 

Sand filter: 

The backwash period for a sand filter should be at least ten minutes, unlike a diatomaceous earth filter. 

Cartridge Filter: 

Ensure that the cartridge filter is clean and in good working order. 

  Brushing and Filtration: 

You will observe a remarkable transformation after 24hrs of chemicals and circulation. For the next three days, it will continue to be hazy, necessitating a lot of brushing and filtration. It will probably still be necessary to brush a few obstinate, isolated green spots. After 24 hours, if your pool is still green, there may be an overabundance of incorrect chemicals, such as cyanuric and phosphate acid for clearing the green pool

The cloudiness won’t disappear right away. It could take up to a week for a sand filter. During this procedure, cartridge filters will require more frequent cleaning than conventional filters: twice daily for at least 2 days. If your DE filter is cloudy and won’t clear up, it may be clogged and in need of cleaning or repair. 

Keep Your Pool Clean: 

Whether you’re using an in-line, floating, or salt system, be sure your chlorinating process is reliable. Always have chlorine in the pool. It is not a good idea to maintain the pool by emptying a jug of liquid into it once a week. Chlorine floaters made with basic tablets are particularly efficient. Make use of a water filtration solution.  

Although initially more expensive to buy, they will end up saving you a ton of time and money. Improper pH levels, a dirty pool, extreme heat, strong winds, and a clogged pool filter You should test more frequently if any of these things are happening in your neighborhood or your pool since you are more likely to experience an algal bloom. It won’t be too much if you do it daily or every other day. 

How to Keep Your Pool Clean to Prevent Green Water? 

You do not want to repeat that activity now that your pool is blue. You may do a few things to maintain the cleanliness and freshness of your pool. 

  • Every week, vacuum your swimming pool. 
  • Your pool’s sides should be scrubbed. 
  • To maintain the water circulating in your pool, go for regular swims. 
  • Every week, check the pH, CYA levels, and free chlorine. 
  • Add substances as necessary. 
  • Thoroughly clean the skimmer. 
  • As needed, check the filter and backwash. 
  • Run the filter for 12 to 14 hours every day. 


Testing is your greatest option if you want to properly fend off the green murk. Whenever the weather is changing or there are lots of people using your swimming pool, test often every day or regularly for clearing the green pool. To successfully control algae, maintain balanced water, optimal sanitizer performance, and clean, functional filters in addition to testing. 




Will chlorine make a green pool clear up? 

Yes! a significant amount is needed in the form of powdered shock. Your pool won’t get cleaner by adding tablets to the skimmer or chlorine generator. However, as liquid chlorine mixes into the water more quickly than powdered shock, you might want to give that a shot. Just be aware that carrying liquid chlorine and pouring it over your pool will be difficult. 

A green pool can be cleared with a clarifier? 

No. Particles are brought together by a pool clarifier so they are large enough for your filter to catch. Your filter cannot completely get rid of algae if you have it. Therefore, you must use chlorine to kill it. Pool floc, which causes the algae to settle to the pool’s surface area, can be used to physically remove algae, although vacuuming it up takes a lot of effort. 

Why are swimming pools quickly becoming green? 

Green water is frequently caused by algae in the swimming pool. Growth of algae could form in your swimming pool if the free chlorine level is too low. If you are subjected to intense heat, slow circulation without utilizing a preventative algaecide, or heavy rain, there are larger risks of growing algae in pool.

Pools that have too much chlorine become green, right? 

Take care if pool water contains too much chlorine, those metals could oxidize and change the color of the water, turning the pool a darker shade of green. If you are having trouble maintaining the right level of chlorine, check the above article to learn about pool sanitizing options.

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