Glad you've had some success.

One caution for future reference: we've advised store-brand bleach for years, to help pool owners escape the confusion of the multiple 'flavors' of Clorox bleach. But now it turns out Walmart is adding 'flavors'!

So, here's the key: ONLY purchase bleach that shows "8.25% sodium hypochlorite".

No %? No purchase! "Bleach" without a % can be 1% or less!