Pool Calculator: Own Chems

Doses in the units on your own chemicals. Most pool apps hand you a number for a product you do not own. This one asks what is on your shelf. Type the strength printed on the jug — 73 percent, 31.45 percent, 12.5 percent, whatever the label says — and the dose comes back in grams or millilitres of that jug. Any brand, any concentration, including the one nobody's dropdown has. Side effects of every dose. Cal hypo raises chlorine, and it also raises calcium hardness and alkalinity. Acid lowers pH, and it takes alkalinity with it. Dichlor adds stabilizer every time you shock. Each step in the plan carries the numbers for what else it moves, worked out from the same arithmetic as the dose itself, so nothing here is a sentence somebody typed once and forgot to correct. Six readings on one sheet. Free chlorine, pH, total alkalinity, calcium hardness, stabilizer and salt sit side by side as…