Green pools and cloudy pool water is normally a lack of pool chlorine. You can easily clear up a green swimming pool.
Green pool water is the bane of every pool owner's existence. It comes on when you least expect it and, like an unwanted relative, seems to hang around forever. But there is a way out. You will first need to have a complete list of chemical readings. You can get this done at your local pool store or use a good pool test kit yourself. I'd encourage you to get a Taylor FAS-DPD K-2006 pool test kit.
You MUST have the most current and accurate readings possible in order to clear up your pool. If you don't it's nothing more than a guessing game. Never rely on anyone who simply hears of a green pool then tells you how to clear it up without knowing the chemical readings, your pool size, and filter type.
Word Of Caution
If anyone says to you, "Oh, your pool is green? Let me tell you how to clear it up. First, get the pH and alkalinity in line. Then shock the pool and add a clarifier. If that doesn't work, put 2 tabs in the skimmer and add a couple bottles of phosphate remover and circulate the water for 24 hours. If that doesn't work, add some algaecide and put another tab in the skimmer." Does that sound familiar? It just might.
Folks, I've been doing this pool gig since 1999. I've cleared up over 700 pools in 3 different states (Arizona, Oregon, and Florida). All were in different locations, different cities, different temperatures and climates with different water sources. I absolutely guarantee that advice will cost you hundreds of dollars, countless hours, and your Summer will be ruined. It's virtually impossible to clear it up without the right information and the proper understanding of pool chemistry that applies equally to every chlorine and salt pool in the world.
Don't rely on test strips. They're easy and convenient but won't give you the actual numbers you need. The colors "Red" or "Orange" are not pool chemical readings.
Your pool chemical readings are:
There are endless reasons why pools go green or cloudy. Chemistry. Filtration. Lack of chlorine. Bad or inconsistent chlorination. The list is long and complex.
Nastiest Pool EVER Easily Cleared Up!!
Cat. 3 Hurricane Pool? No Problem!!
Yellow Algae Pool? Fuhgettaboutit!!
It's also good to know the readings for your fill water as well. You want to know what's going in your pool at all times. Next is to minimize the clarifier, flocs, and/or phosphate remover use. "Why is my pool cloudy?" This might be one of the reasons. Remember when you have green pool water, shocking a pool is a process, not a product. Regardless of what anyone has told you, this is the truth. There are no products that are "shock". The package might be labeled as "shock", but it's misdirection on their part.
During this process you can use a PolyQuat 60 algaecide as an added backup against any algae blooms that might occur. The trick in clearing up a green swimming pool is to get the pH in line and maintain a high chlorine level for a period of time. That's why you shock in the evening, retest in the morning, then add more chlorine. Let the filter do its job. Be sure to clean the filters or back wash every day.
Remember to test morning and evening and keep the chlorine level at 15 ppm or above as best you can. You may need to do this for a few days. When the pool turns a white/gray color, you only lose 1 - 2 ppm of chlorine through the night, and you're water is clear, you'll know the algae is dead. If the chlorine loss is more you probably still have some residual algae. If you have a pool store that's close, take a sample of water to be tested after every turnover of the water. This is normally about 8 hours. Morning and night. They should do it for free.
Make sure the CYA is in the proper range of 30 - 50 ppm. Add stabilizer if it's low. To quickly increase your CYA you can use:
Follow the direction on the package. Be careful when using Dichlor as it can get out of hand quickly. For every 10 ppm of chlorine added with Dichlor, you'll raise the CYA by 9 ppm. For every 10 ppm of chlorine added with Trichlor you'll raise the CYA by 6 ppm. Use liquid chlorine when shocking a pool. Chlorine granules have a pH of 12. Your pH level might go through the roof and you'll be adding more calcium to your pool. To help with the filtration at the very end you can use a clarifier.
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