TC: 11
CC: 0-0.5
PH: 7.5
Alk: 80
CH: 240
CYA: 18
Temp: 75-80
Hi, algae start growing on walls, when I backwash filter water is green colored, not brown.
I keeping pool around 10 ppm chlorine, it's recommend shock level for 20ppm CYA, I know it's not recommended, is it lead to a flaw grown or...