Anemone?

[EmilyB]

You can't place an anemone where "it should be". It will find it's place and you better make sure it can't get into a powerhead.

I've got a RBTA right now that had two spots, something new for me. During the day, it was on the glass, and towards evening always ended up in it's normal spot in the rock.

I cleaned my powerheads... and it seems much more settled...