Split from here. JasonLion
Well then what does TDS mean. I have been in the pool industry for over thirty years an I reallywant to learn something new so PLEASE explain to me what it is. Why when a pool has over 5000 TDS no matter how much chemical you throw at it no change. But miracle of miracles when you drain some and refill you suddenly have clear water. What the op has I believe is a case of algae from neglect by previous owner. And a byproduct of past care is the high TDS reading that has noting to do with algae.