Thank you -
1. I haven't found 12.5% bleach anywhere - suggestions on where to find it?
2. Just went to Walmart & Lowe's looking for the recommended HtH Algaecide, but the HtH they have does not have the 60% Polyquat, so I didn't buy it. Sounds like you think I don't really need this? (Getting ready to try Leslie's or Anthony Sylvan.)