I have a 60 gallon cube with a 30 gallon sump a mixture of LFS live rock and 50lbs of Marco Rocks. Currently I have 3 blue/green chromis, 2 percula clowns, a blood red shrimp. I also had a blue cheek sleeper goby, I added 2 fire fish to the tank and the goby went nuts. I read a post about changing his house when a new species is introduced. So, I pushed some gravel in front of his hiding spot. 2 days later he killed one of the fire fish and the blood red shrimp ate his remains:shock::shock: Now I cant find the other fire fish and now the goby is no where to be found?