Got a blenny question, glad I found this revived thread. I have a bi color blenny which has from the day I introduced him into the tank has used my hydor power head as his home. Because of that I haven't been able to use the power head and algae in dead flow spots of the tank is building. I'm worried if I turn it on he will be dumb enough to swim into it and die. There is enough rock work for him. I actually thought of buying another power head to use but figured he might swim into that one as well. Inside the tank I have a occelaris clown, six line wrasse and a royale gramma. Any ideas?