A Florida pool needs four chemicals: chlorine (liquid is best), cyanuric acid stabilizer at 30–50 ppm, acid or soda ash to hold pH at 7.4–7.6, and alkalinity at 80–120 ppm. Many Florida pools also need phosphate remover. Most algaecides and weekly clarifiers aren't necessary.
The Core Four — What Every Florida Pool Needs
Chlorine. The primary sanitizer. In Florida you have two practical options: liquid chlorine (sodium hypochlorite) or trichlor pucks. Liquid chlorine is what professionals use — it's pure sanitizer with no side effects. Trichlor pucks are convenient but add cyanuric acid every time you use them. Over a Florida summer, puck users frequently end up with CYA levels above 100 ppm, which locks up chlorine and makes it ineffective regardless of how much you add.
Cyanuric acid (stabilizer). Protects chlorine from UV degradation. Target range: 30–50 ppm, or 20–40 ppm for a screened pool. Salt pools use the same range. Too low and Florida sun destroys your chlorine by noon. Too high and chlorine can't sanitize effectively. Most pool stores don't tell you about the upper limit problem.
pH adjuster (acid or soda ash). Florida pool water drifts alkaline over time — from tap water, bather load, and chemical additions. Target pH is 7.4–7.6. High pH reduces chlorine effectiveness and clouds the water. Low pH corrodes equipment and irritates eyes. You'll use muriatic acid (to lower) and soda ash (to raise) depending on which direction your pool drifts.
Alkalinity increaser. Total alkalinity buffers your pH so it doesn't swing wildly after chemical additions. Target: 80–120 ppm. Low alkalinity means your pH bounces all over the place and your other chemistry becomes unpredictable.
What Florida Specifically Changes
Phosphate remover matters more here than in most states. Florida's landscaping — St. Augustine grass, palms, oak trees — drops significant organic material into pools, and rain runoff from fertilized lawns loads phosphates into the water constantly. If you're fighting algae year-round, test phosphates before spending more money on algaecide.
Calcium hardness matters more with salt pools — and Florida has a lot of salt pools. Low calcium hardness causes a saltwater pool to pull calcium from plaster surfaces, shortening plaster life significantly.
Not sure where your water stands? We test all seven parameters on every visit — not just the three on a standard strip. See what full-service weekly maintenance includes and costs.