hi. i read topic on algae treatment and prevention, but I have problems still
- situation: came back from 10 day holiday to a green oasis, pool about 22000 gallons
- chemical reading were FC 0, PH >8.2, TA 110, CYA 70
- brought PH to 7.5 and FC to 3 ppm
- used one quart of silver algaecide as per directions including brushing, backwashing, etc...
- then in evening shocked pool with 3 lbs of sodium dichloro s triaz.... Dihydrate (could not use the bleach calculator, cannot download on ipad so I used Calculator at http://www.swimuniversity.com/tools-dow ... calculator
- this morning, pool is transparent again but, still have greenish-yellow stains at bottom, I brushed all over, vaccuumed and backwashed and added water
- worried because now readings are FC 17.5 (yuk), CC 0.5, PH 7.3, TA 100, CYA 55
So, questions:
-how do I get rid or remaining stains, does that mean I still have algae,
- is FC way too high and how do I correct
- what is FC measurement for shock value
The pool was re-plastered at beginning of summer so I am not too keen on using metal brushes
Thanks for your advice
callyann
- situation: came back from 10 day holiday to a green oasis, pool about 22000 gallons
- chemical reading were FC 0, PH >8.2, TA 110, CYA 70
- brought PH to 7.5 and FC to 3 ppm
- used one quart of silver algaecide as per directions including brushing, backwashing, etc...
- then in evening shocked pool with 3 lbs of sodium dichloro s triaz.... Dihydrate (could not use the bleach calculator, cannot download on ipad so I used Calculator at http://www.swimuniversity.com/tools-dow ... calculator
- this morning, pool is transparent again but, still have greenish-yellow stains at bottom, I brushed all over, vaccuumed and backwashed and added water
- worried because now readings are FC 17.5 (yuk), CC 0.5, PH 7.3, TA 100, CYA 55
So, questions:
-how do I get rid or remaining stains, does that mean I still have algae,
- is FC way too high and how do I correct
- what is FC measurement for shock value
The pool was re-plastered at beginning of summer so I am not too keen on using metal brushes
Thanks for your advice
callyann