8O :roll: :? I'm wondering just how heavy Diatom algea can get. My rock and sand is covered with a nice carpet of brown. I also have these small "bubble" like plants growing on my rock I don't think it's bubble algea only because it's not really a slimly looking bubble it looks just like a small plant. I'm 3 plus weeks into my cycle all my levels are good Ammonia is "0" Nitrite is "0" my Nitrate is 13.2 ppm, My Alk is at 10.6 DKH and my Calcium is at 452ppm. I've tested for Phosphate and silicate and both around .1ppm. I'm using RO/DI and I've done 3 water changes approximatly 25% each time. My temp is at 79 degrees and my SG is 1.024. Any suggestion on what I can do to clear this stuff up would be greatly appreciated. I have also added a small clean up package.