Pool is Green Again

[ganny76]

Salt cell quit in me and pool turned green before i could get another one. FC is 6. I know i have to get it up. How much bleach shoild i use. Been usung 3 gallons a night and hasnt touched the stuff. CC is 0, PH is 7.4, TA is 130, CH is 110 and CYA is 70. Thanks in advance.

[Watermom]

Shock level for a pool with a CYA of 70 is 20ppm. In a 21K gallon pool, each gallon (4 quarts) of 6% bleach will add about 3ppm of chlorine. Each gallon of 8.25% bleach will add 4ppm. Use that info to help you figure out how much chlorine to add each time you test to get the chlorine level back up to 20.

[ganny76]

Checked this AM and it was 18. Went ahead and dropped 2 gallons. Should be obercast mostly today with TS Andrea. Will check again this evening. Should i sweep everyday?

[Watermom]

Is there debris on the floor to be vacuumed up? If so, then yes. You can also brush the floor and sides which will help the bleach kill the algae faster.

[ganny76]

I don believe there is. Cant see the bottom. I gave it a good sweep. Will check chlorine levels here shortly. Been raining non stop all day so i am sure its deluted some.

[ganny76]

Should I get my CL up around 26-30 so it doesnt drop below 20 during the day when I am at work? I start the day at 20 or a little higher and its down to 16ish at night. Dont seem to be making much headway with the green.

[BigDave]

Right! enough chlorine to keep the FC at or above shock level at all times.