I have a 40 gallon tall, a HOb filter, and a Petco King Powerhead. I had put it on a rock and it indeed moved itself to the sand and looks like it's staying put. I have another question. It started hosting a Domino Damsel... And the damsel as soon as it started going in to the amemone, it started getting white spots kind of looking like ich. Is there any harm/scaring done when they first start familiarizing or is it indeed looking like an ich outbreak? I do have other fish in the tank also. Should I start quarantining and medication on the damsel to be on the safe side? I tried catching him today with no luck.