Trouble Free Pool exists to develop and promote a simple, inexpensive, and effective system of pool care.

Dec 13, 2025 · Algae - Prevention and Treatment New Treat and prevent all types of swimming pool algae - green, yellow, mustard - we're here to help you clear up your green pool water!

PoolMath Discover the pool calculator behind the perfect pool, PoolMath. Dealing with pools has allowed TFP to become the original authors of the best calculator on the net. To help you better understand …

Jan 18, 2019 · Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.

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Apr 23, 2013 · Re: Shocked pool last night and it turned green within the h After using 1lb of cal-hyp on 4/18, the pool was clear green on 4/19. I thought it was algae because my numbers were good on …

Apr 25, 2018 · Hey all, Just had pool opened yesterday and I have found my pump off twice now when it should be on. My schedule set is on from 4am to 3am then off an hour and back on. Any ideas on …

Jun 20, 2012 · Re: Any downside to using sodium thiosulfate to lower cl lev You're calcs look right, but I wouldn't add anything to the pool. I get full sun on my pool all day and with a 40 ppm CYA I lose …

Dec 12, 2018 · Learn the basics of pool chemistry - chlorine, pH, alkalinity, stabilizer, and hardness - to keep your pool water clean, clear, and perfectly balanced.

Aug 2, 2025 · Further Information See How do I use Chlorine in my Spa (or pool)? See How do I use Bromine in my spa (or pool)? Ask questions in the Spa and Hot Tubs Forum Section.