Its starting to look a lot better after I stir. In fact I think the little discoloration I get is due to dirt. It quickly turns back into a cloudy/blue. Tests this am. Fc: 14.5, cc: 0.5, ph: 7.0. I see what you mean on the tabs driving the ph down cause I have been adding borax to keep it up and it keeps coming back down. I added more borax dissolved in hot water and the pucks are almost gone so hopefully that will solve this issue would it be okay to put the filter in at this point to try to clean this up? I have vacuumed a few times and gotten quite a bit of algae out. I cannot vaccuum to waste as imy vacuum is hooked up to my pump.