I pulled out my Koralia 3s last night to get sent back to Hydor, but haven't put the old powerheads back since I was running late. My Potter's angelfish isn't a fan of change... so he's not happy with this subtle flow... So playing with my webcam today from work, and can see him going around and around and around and around in a circle in his "comfort" spot where he goes if something isn't right. He goes around once every 2s (always in the same direction), so I am estimating about 1800 times an hour he's going around, with an occasional break for a snack... LOL. I suspect Potter's have a genetic trait for OCD.
-Mike
-Mike