Pool is an Aqua Leader 24' above ground 15,000 gal with a Hayward 1.5 HP pump and 18" sand filter with 1.5" PVC plumbing connections. We were using tabs in a skimmer until about 2 weeks ago, I am not sure if they were stabilized or not. I guess they were because of the CYA level. We figured we would use them up, and our local pool shop said that anything under 120 was just fine when we asked today... Their test results said CYA=95. Thanks for the help.