I know the answer is, "Until the water is clear", but it's been 5 days. I'm adding two gallons of 12.5% chlorine into a 15k gallon pool every day. FC drops to 3 and I dump in more (measuring carefully using the app). pH 7.4, TA 30, CYA 30. There's also a floaty thing with chlorine tabs. Vacuuming daily, there's no leaves or debris. It's just not clearing up, although it's not all that green either, compared to prior years at this time. Thoughts?