Ok, I have placed all my corals by hand and none of them have moved on me. I just follow the rule: The darker they are, the deeper they go. This works well for the mushrooms. The fish in "reef4" is my Pygmy Angel. I also have 2 Chromis, 2 Neon Gobies, a Purple Psuedo., and another gobie that I havn't a clue to the name. I think he might be a Barred Gobie?? There is a picture of him in "reef6". I know it sounds extremely overstocked, but my largest fish is less than 2" and when the chromis get larger, I'll remove them. I also have a Cleaner shrimp, Coral Banded Shrimp, Horseshoe Crab, Emerald Crab, about 17 mixed hermits, and 4 snails. Any suggestions on my mystery Gobie?