Hi, I'm new to this forum and SW tanks so I have a few questions. First, my set-up I have a 110 gal tank, wet/dry w the bio-balls, protein skimmer, UV ster, chiller, carbon packs above the sponge in the sump, phosphate guard packs in the sump, nitrate remover packs in the sump, and I forget what it's called, but the large stone under my bio-balls that is claimed to prevent frequent water changes, as far as lighting I have a 48" Pc with moonlights and also have 4m DQxSC whatever that is(?). Ok now in the tank I had set up on the 1st day 150lbs of live rock, 80lbs of live sand, and had a truck come in and fill with salt water from the ocean. I put in 5 damsels, 25 turbo snails, and 25 hermit crabs. The tank NEVER had a spike in Amm. and it is now a month old. All was well with nitrites and nitrates until I added a star polop and an anomone(sp?) yesterday and now I have my nitrites at .5! I have no nitrates and no Amm go figure! This makes no sense to me. Both new pieces semm very happy as the anomone is now 3 times the size that it was in the store and in the store it WAS open! I wanted little ones to let them grow into the tank. Maybe it's what I put in the tank? I put all kent products. Coral accel daily, stron and moly(sp?) every 4 days, tech-1 weekly, tech-m weekly, coral vite weekly, liquid calcium daily, but keep levels at around 450, ph-buffer when needed, but ph is solid at 8.2, phytoplex 2times week, zooplex 1 time a week. Why am I having a problem? Any advice would be appriciated.