Home / Chlorine: tablets vs powder vs liquid
Chlorine: tablets vs powder vs liquid
All chlorine sanitizes, but each type leaves something else behind. In hard-water areas like Scottsdale, that difference matters.
| Type | Adds to water | Best for |
|---|---|---|
| Liquid chlorine (sodium hypochlorite) | Some salt; raises pH slightly | Daily or every-other-day dosing; doesn't add calcium or stabilizer |
| Tablets (trichlor) | Stabilizer (CYA); lowers pH | Steady feeding in a floater or chlorinator; watch CYA build-up |
| Powder shock (cal-hypo) | Calcium | Shocking; use sparingly in hard water |
| Dichlor shock | Stabilizer (CYA) | Quick-dissolving shock; adds CYA |
The Scottsdale approach many owners use
Liquid chlorine as the main sanitizer, with a modest amount of stabilizer to protect it from the sun, avoids piling up calcium or stabilizer in water that's already hard and evaporating fast.
Safety: never mix different chlorine types or add chlorine and acid together. Store chemicals separately, out of the sun, and follow every label.
Recommended supplies
- Liquid chlorine — Adds no stabilizer or calcium; good for hard water.
- 3-inch chlorine tablets (trichlor) — Slow-dissolving; adds stabilizer (CYA) and lowers pH.
- Chlorine floater / inline chlorinator — Feeds tablets steadily.
- Pool shock — For heavy use, algae or after storms.
- Pool stabilizer (cyanuric acid) — Protects chlorine from the sun.
Need a repair or weekly service? Request a pool pro.