I have a 54 gal bowfront tank with built in overflow. Currently, I have a wet/dry filter attached powered by a Supreme Mag Drive utility pump. I attached a triangular wide nozzle to the return so it creates a lot of turbulence. The wet/dry acrylic container holds about 8 gals. of water. I have 80 lbs of Nature's Ocean Bio-Activ Live Aragonite sand and lots of live rock. The tank has been up for 3 months and there is a lot of color to my rocks. From all my reading and advice, I was told that the bioballs are not necessary and that these would eventually make the nitrate levels go up. Now my nitrates are at 10 mg/l! I will be removing these. Is there a special way to do this? I have been researching the protein skimmers and want opinions about these two: Aqua C Urchin with Maxi Jet 1200 and the Red Sea Berlin Turbo skimmer with pump. I am limited in space because the bioball container on my box takes up about 1/3 of the space. With my mag pump in there, I only have room for a 6"x6" skimmer footprint. One last question, the deep layer of my sand is getting some purple color (as seen from the front of the tank)...any opinions on cleaning or should I leave it alone? Thanks for your replies! I am very excited about this new hobby!