Dinos are back. I thought it was diatoms but tonight confirms they are back with vengeance. I just ordered a boat load of corals too. I am having a hard time keeping phosphates up. I dose, 2 hours later it reads correct, next day zero. I am able to keep nitrates up to 5-10. I might have to put the UV back on the tank. Which sort of sucks because I really can't plumb one in so this thing has to sit inside the tank. My corals are finally starting to come back from the week of lights off too. I slowly slowly raised the par on my lights. Ugh this really sucks. I just want to enjoy this tank, but it is always so disappointing to me. I might resort to chemical warfare.