Category
Water Care
Topic
Pool Care & Maintenance
/ Overview /
Why Water Chemistry Matters
Balanced water keeps swimmers comfortable, protects your equipment, and stops algae before it starts. You do not need a chemistry degree, just a few numbers to watch.
The Key Levels to Know
pH: 7.2 to 7.6
Free chlorine: 1 to 3 ppm
Total alkalinity: 80 to 120 ppm
Calcium hardness: 200 to 400 ppm
Test at least once a week, and after heavy rain or a busy weekend of swimming.
Small Adjustments, Big Results
Make one change at a time and retest before adding more. Small, regular corrections are easier than fixing water that has drifted far out of range.
What Each Level Does
pH decides how comfortable the water feels and how well your chlorine works. When it drifts high, chlorine slows down. When it drifts low, the water can sting and start to wear on metal parts.
Alkalinity acts as a buffer that holds pH steady, while calcium hardness protects plaster and tile. Chlorine does the daily work of keeping bacteria and algae under control.
How to Test Your Water
Test strips are quick and fine for a weekly check. A liquid test kit takes a few more minutes but gives a more accurate reading. Collect your sample about elbow deep and away from the return jets.
When to Ask for Help
If your levels keep moving after you adjust them, or the water stays cloudy when the numbers look right, the cause may be your filter or circulation. A technician can find it in one visit.