After fighting the algae for two weeks and being told on here to just keep pouring the bleach in, I decided to use the polyquat. The NEXT day my water was clear as a bell and all I had to do was vacuum the dead stuff up. From now on, I'm starting off with the polyquat and saving all that money on bleach. (We wasted about $100 or more JUST on bleach.) Thank you, Michael so much for giving the push to use it!!!