Hello all, I have a 55 gal. FOWLR that has been setup for about 6 months now. My reading are as follows: Am: 0, Trite: 0, Trate: 5 (and dropping thanks to chaeto), Phos: .5, Alk: 12dkh, Calc: 400, SG: 1.026. I have 3 powerheads(one in each corner facing center of front wall and one in center of...