Neep help. I put my first fish in about 3 weeks ago which was a purple dotty back. I have a 65 gallon sw tank. 50 pounds dry rock, 20 pounds live rock. After about ten days i went to lfs and wanted 2 orange clowns and my wife chimed in and said to get more so i got a 6 line wrasse and coral angel. I definitely thought it was toomuch at once but the lfs assured me it was ok because its a big tank and they were all small fish. Low and behold, 1 week later the purple dotty back and then 2 days later(today) the coral angel and one clown died. The water levels are ok. Ammonia, nitrite and nitrate are all undetectable. I am getting some brown residue on top of some of the live rocks and on the powerheads(is that normal?). I cut my lightsdown to about 3-4 hours a day(currently have regular flourescent lights. Im hoping it was just the stress of adding all 4 at once with i now regret. Am i missing anything? Salinity is also good 1.021 in that range. Im running protein skimmer 24/7 and getting some good gunk in there every 3-4 days.