Come home today to find one of my clownfish had checked out on me,he was laying on one of the powerheads.Didnt look like he had been sick though,and all water paramaters are in check.Have noticed that my Lawnmower Blenny had been chasing them around a bit and he was a little lighter colored on top in one place.I replaced him today with another and noticed that the one from the LFS has a lot more color then the one in my tank.Any reason for this?