The “why” behind the numbers — clear, sourced explainers on pool chemistry. Read up, then jump into the calculators to put it into practice.
Target ranges for chlorine, pH, alkalinity, CYA, calcium, and salt — and what happens when each drifts.
Coming soonWhy no chemical removes CYA, and exactly how much water to drain to bring it back into range.
Coming soonMost pool problems come down to chemistry that has drifted out of range, and almost all of them are fixable once you understand what each reading is doing. These guides explain the “why” in plain English, then point you at the calculator that turns the explanation into an exact dose for your pool. They’re written for homeowners and working pool techs alike, and every chemistry claim is sourced.
If your water has turned, start with how to fix a green pool or cloudy pool water, then size the cleanup with the shock calculator. If chlorine keeps vanishing, read why won’t my pool hold chlorine and cyanuric acid & chlorine — the FC/CYA relationship is the single most misunderstood part of pool care — then check your numbers with the chlorine and CYA calculators.
For routine upkeep, how often should you shock your pool and how long after shocking can you swim answer the two questions that come up every week, and draining a pool with a garden hose walks through the siphon method when you need to lower the water. Read the guide first, then run the matching calculator to get numbers for your exact pool.