Pool Stats: (1997) 21.3k IG, Sta-Rite Sys 3 600sq ft Filter, AO Smith 2.2hp single speed motor, in-floor clean jets.

Test results: 12 FC, 2 CC, 7.6 PH, 130 TA, 750 CH, CYA is off chart w/ K-2006...1/4" below 100 reading.

Location: AZ Desert Pool Temp: 88 to 92 in season.

Sanitation History: trichlor tabs and dichlor shock

Goal: Transition to BBB method, reduce CYA and Calcium Hardness, if recommended.

Details: took over pool last season, after many years of pool service. Plan to drain 1/2 pool and refill, any
thoughts? BTW, fill water is testing at 250 CH. Any rule of thumb on amounts of BBB to stock?

Any and all guidance much appreciated.