I did read the pool school before posting
How are these figures a random guess? 7/2: FC - 0, CC - 0, pH - 7.5, TA - 100, CH - 250, CYA - 35, Phosphates 0
water tested with a Taylor FAS-DPD kit, also separate checks with aquacheck, hth, and guardex tests... all with same results.
I thought...