I have a 20 ft Intex AGP. I let the water go green during the winter. Two weeks ago I slammed it, easily killing the algae and passing the OCLT test by the second night. There was a lot of dead algae on the bottom and also, I assume, suspended. I've vacuumed most of it out and have been running the sand filter, backwashing as necessary, pretty much continuously for nearly two weeks now. My water looks clear, but cloudy. I can see down about halfway to the bottom but it's too cloudy to see the bottom. I don't see any improvement from day to day.
My CYA is 50 and I've been keeping FAC between 3 and 6.
My TAC number matches the FAC number.
CH is low (100) but I don't care as it's a vinyl pool.
TA is 90
ph remains in range, 7.4
copper and iron are 0
Total dissolved solids is 900
The only outlier is phosphates which measures 200 with Leslie's saying it should be below 100.
I've tried 5 oz of PHOS Free poured directly into the skimmer and don't see any improvement.
Prior to that I've done several "Ultra Bright" treatments, all to no avail.
I'm thinking the next thing to try might be to see if any neighbors have a cartridge type filter they aren't using and run that a few days in place of the sand filter because that type, per TFP, filters out smaller stuff.
Any suggestions/recommendations/ideas? Help please!
Oh by the way, this winter I will treat the water with the polyquat stuff so as to hopefully prevent the water from going green over the winter.
My CYA is 50 and I've been keeping FAC between 3 and 6.
My TAC number matches the FAC number.
CH is low (100) but I don't care as it's a vinyl pool.
TA is 90
ph remains in range, 7.4
copper and iron are 0
Total dissolved solids is 900
The only outlier is phosphates which measures 200 with Leslie's saying it should be below 100.
I've tried 5 oz of PHOS Free poured directly into the skimmer and don't see any improvement.
Prior to that I've done several "Ultra Bright" treatments, all to no avail.
I'm thinking the next thing to try might be to see if any neighbors have a cartridge type filter they aren't using and run that a few days in place of the sand filter because that type, per TFP, filters out smaller stuff.
Any suggestions/recommendations/ideas? Help please!
Oh by the way, this winter I will treat the water with the polyquat stuff so as to hopefully prevent the water from going green over the winter.