Well. all of my phosphates are gone for now. everything is back to 0, and calcium is up at 380-400. havent done a water change in a week. Should I do one? all i have in my 75 would be a few corals, 3 nems, 2 clowns, 1 scooter blenny, 1 starry blenny, 1 sandsifting star, and about 6-7 hermit crabs.