- Jul 11, 2012
- 13
Hi everyone. I’ve never posted before. I have a 10,400 g fiberglass pool, pentair pump, 24” Hayward Pro sand filter [7 years old], Pentair heater, Hayward PS8 controller for SWG with T-15 turbo cell. For past 7 years have had crystal clear water within weeks of opening using TFP SLAM method and values during pool season. However, will also throw in that in the past 7 years have gone through 3 solar covers and the little blue dots I’m sure got into the sand filter. Not sure if they backwash out, but kinda assumed they did...
After pool was closed down last season, we took off cover while bricks were being re-sealed. The brick guys used polymeric sand and a top sealer applied with a sprayer, getting into the pool. I removed as much of the chemical sealer that polymerized on top the water as I could, then put cover back on and let winter go by. Enter 2024
I opened early [4/1/24] and the water was deep forest green but no chemical residue on top. Before turning on the equipment, mega-shocked for weeks with brushing until the bottom was visible [no equipment running], vacuumed the bottom to waste, then turned on filter. Despite SLAM’ing to CC <0.5 with CYA 60, salt 3000, pH 7.5 and taking Chlorine to 18. Pool wouldn’t clear.
After 2 weeks we replaced 1/2 of water, [water was clear with the replacement] brought salt up to 3000 and CYA up to 60 again, pH 7.4, and SLAMMED again. Filter has been running for another 3 weeks and the water is very cloudy, but pool blue. Can’t see bottom.
Questions:
After pool was closed down last season, we took off cover while bricks were being re-sealed. The brick guys used polymeric sand and a top sealer applied with a sprayer, getting into the pool. I removed as much of the chemical sealer that polymerized on top the water as I could, then put cover back on and let winter go by. Enter 2024
I opened early [4/1/24] and the water was deep forest green but no chemical residue on top. Before turning on the equipment, mega-shocked for weeks with brushing until the bottom was visible [no equipment running], vacuumed the bottom to waste, then turned on filter. Despite SLAM’ing to CC <0.5 with CYA 60, salt 3000, pH 7.5 and taking Chlorine to 18. Pool wouldn’t clear.
After 2 weeks we replaced 1/2 of water, [water was clear with the replacement] brought salt up to 3000 and CYA up to 60 again, pH 7.4, and SLAMMED again. Filter has been running for another 3 weeks and the water is very cloudy, but pool blue. Can’t see bottom.
Questions:
- Could the chemicals or even the cover circles have destroyed the filter?
- Replace sand or entire sand filter?
- What about going to DE if sand is shot?
- Any other thoughts would be much appreciated.