Shock level is based on CYA level. (See the Best Guess Chlorine Chart in my signature below.)
Shock level is based on CYA level. (See the Best Guess Chlorine Chart in my signature below.)
I am unable to check my cya at this time
20' x 48" Intex round Ultra AGP ~8800 gallons -- Intex krystal clear 635t 1500gph; PF: 13