Hello, my name is brian and I live in Lawrence, KS. I just recently bought a 36 gallon reef setup. I let my tank cycle with live rock for about three weeks while I kept my fish in quarantine. My fish had been doing great until about 3 days ago when all but one of them started to become very lethargic and eventually dying. My corals and anemones are thriving and so is my cowfish, but I've lost a mandarin dragonet, convict tang, 3 pink skunk clownfish, 2 hermit crab, and a peppermint shrimp all in the last few days. I've checked all my pH, nitrate, nitrite, ammonia, calcium, water hardness, and everything else in my test kit. I've taken water samples to the pet store to have them checked and everything was fine. Does anyone have any suggestions as to what I could be doing wrong?