I add almost 1 USG per week to our 26,000 USG SW pool here in Houston every week in summer and 1/2 that in winter. Pool is currently 92 F and have 2 HP pump circ 20 hours per day of which about 1/3 (guesstimate) goes into spa and then to pool via a cascading face to the spa, about a 1 foot drop.

Silly question, muriatic acid = HCl equals H & Cl, when HCl is used, does it liberate the Cl, I side benefit is that it chlorinates pool, if so then I'll add my HCl after party as a sort of ph & shock all in one.