Opened my pool about a month ago. Shocked it once a week and have been vacuuming. Noticed debris on the bottom a few days later after vacuuming where it didn't even look like I vacuumed. We have had no rain since January, and thought it may just be really dusty and that is what was settling to the bottom. Water has always been clear. Then started to notice algae growth.
I have an AG 24' 13K gallons. Sand filter. Sand brand new last year.
I pumped to waste because the algae would come right up with no scrubbing. I shocked with 4lbs of chlor brite from Leslies only to have the algae back on the bottom by the next night. My water levels have all been within range. No phospates, pH 7.4 is fine, hardness fine, CYA is now at 80. Sorry I have no other numbers. Have had my water tested several times and all have been ok. This last time I pumped to waste again, put an algaecide in it, and shocked with another 5lbs of shock only to have the pool green on the bottom again. Leslies pool supply doesn't know what to do at this point and I am sick of spending all this money!! I don't want to ruin the liner with all that shock either. The chlorine is way above normal, and the test kit I have only goes to 5ppm.
What can I do at this point? What kit can I go buy to give ya'll proper readings? The water is clear, not cloudy. The algae keeps coming back really fast. Never had this problem before.
Thanks and glad I found this site!