Hayward Team May 23, 2023

Pool and spa water chemistry along with proper filtration is the key to clean, healthy water. It doesn’t matter if you have 100 or 1,000,000 gallons of water, the same balance levels and chemical types are required—only the quantity will vary. Everything that enters the body of water affects water balance: swimmers, rain, pollution, animals and chemicals.

Every pool, each season, creates its own demand for different chemicals. The pool in your neighbor’s yard, with the same system and environment may react totally different than yours. Every pool also develops a pattern each season. After observing how your pool reacts to different bather levels, rain and the environment, you will get a handle on your pools chemistry pattern and what’s required to keep the water balanced.

Accepted levels for balanced pool or spa water: 
  Pool  Spa
Total Alkalinity    
Plaster 80-120 ppm 80-120 ppm
Vinyl 100-150 ppm 100-150 ppm
PH 7.2-7.6 7.2-7.6
Bromine 2-4 ppm 3-5 ppm
Total 1.0-3.0 ppm 2.0-4.0 ppm
Free 1.0-3.0 ppm 2.0-4.0 ppm
Cyanuric Acid 30-100 ppm 30-100 ppm
Calcium Hardness    
Plaster 200-400 ppm 200-400 ppm
Vinyl 175-300 ppm 175-300 ppm
TDS < 2000 ppm < 2000 ppm
Copper < 0.3 ppm < 0.1 ppm
Iron < 0.3 ppm < 0.1 ppm