The tank has been up for about 6 mo now. Yes, there is a lot of HA. I've been doing everything to get rid of it, but as we all know it's a long slow battle. The good thing is that I'm beggining to notice a leveling off of HA's growth. All my Chem are in check and as you can see below I think I have more than enough of a cleaning crew for the size tank. We'll see what happens over the next 6 mo.