If you viewed my other thread on the purple and yellow tangs I have decided to not add any more tangs into the tank. I will be adding other reef friendly fish wrasses ect. To the system but not for a while. I still plan on having a SPS Dominant tank even with all the fish, I'm confident in the size of my Skimmer, fuge, and my Bio pellets. Along with the 40 gallon water changes every 2-3 weeks..... I do have some bad news though that I'm honestly depressed about, yesterday afternoon I feed the fish and everyone was getting along and ate well no fish had any signs of illness or anything IV put in 15+ hours observing the tank and never did I see any aggression between the fish. Just my yellow belly damsel was a ***** at times to the 6 line. Well I fed the fish and left for school and came back an hour later and immediately once I got how sat in front of the tank ... one of the yellow bellys and the blue hippo lay lifeless on the sand bed (( I have no idea what happened all thank levels were perfect. My dad who remained in the room watching TV said he look over at a commercial break and took note of all fish and buy the next commercial the two fish were lifeless on the sand. What the hell happened???