Pool chemistry guides
Plain-English pool chemistry: chlorine, pH, alkalinity, stabilizer, shock, cloudy and green water, with a calculator in every guide.
Problems and fixes
- Cloudy Pool Water: Causes and How to Fix ItCloudy pool? Find which of the five real causes you have (early algae, scaling, filtration, dead algae, debris) and fix it the right way.
- Green Pool Water: How to Fix ItWhy pools turn green and how to clear one reliably: test CYA, SLAM with liquid chlorine, brush and filter, and know when you're done.
Chlorine and stabilizer
- Cyanuric Acid Too High: What It Means and How to Fix ItWhy high CYA forces you to run more chlorine, how to confirm the reading, how much water to replace, and how to stop it creeping back up.
- FC/CYA Chart: How Much Chlorine Your Pool NeedsThe chlorine-to-cyanuric-acid relationship explained, with a chart of minimum and shock (SLAM) chlorine levels for every CYA level.
Volume
Chlorine
pH
- How Much Muriatic Acid to Lower pH in a PoolWhy there's no single acid-per-gallon number for pH, how to calculate the right dose from your TA, safe dosing steps, and the dry acid equivalent.
- Pool pH Too High: Causes, Symptoms and the FixWhy pool pH keeps rising, what high pH actually does, and how to bring it down and keep it down with acid, TA and aeration control.