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 …

Sep 11, 2011 · After getting estimates for opening my pool (~$500 including taking off cover, removing plugs, reconnecting heater & pump, initial vacuuming, and initial shock with chlorine), I think I'm …

Aug 23, 2007 · had a lot of rain here lately, 10 inches this week. Having problems getting a good ph reading. When I add 2 drops regent the tube turns bright red. So I used a 10 ml tube, turns red at 4 …

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.