I personally would stay away from the pool store--the poster before me was right in that they're just selling you stuff you don't need.....the definition of "pool stored"!

Your plan of attack is a good one, but let me throw in a couple more things for you to consider...

First, be aware that when you add the polyquat, it will significantly drop your chlorine level, so make sure you get that back up immediately. I personally would skip the polyquat and spend that money on bleach. Secondly, you don't give a combined or total chlorine reading--so algae may or may not be the only thing that's consuming your chorine. A combined or total chlorine reading would be helpful in getting the overall picture. Also, is there a possibility that copper has somehow been added to your water? Have you used WalMart trichlor, or maybe added any type of algaecide containing copper?

Keep your chlorine up into the 15-20 range, keep your filter running, and brush it daily...it'll clear up, as long as the problem isn't metal related.

And welcome back to the forum!

Janet