may have been a problem as I bought some cheap 48% from Walmart ( headed to trash now) and I did put it in win with bleach. My pool is still clear just a smidge of yellow in a corner not much, Ill brush that. Is there a time when I can add 73% cal hypo in the bag to aid my pool or just leave it out? I don't know why I'm so messed up on this. My pool still looks clean. Thank you Dave