About three weeks ago in Chicago we had a bad storm loss of power for a day. My goby was looking very unhealthy. I never saw him again, and he was always in the same spot for nearly a year. I assumed he was dead. I just looked in my refugium tonight and sure enough there he was! No idea how he could get in there since the return goes into a micron sock, and the refugium floats on the top of the sump with no access to any other part of the sump....But anyhow even tho I am having issues right now with my tank this made me extremely happy since I became rather attached to this particular fish.....Never thought I'd say that!