I got a gba and it has attached itself to the side of the tank out of the light. It tenecles comes out at night but during the day it shirnks up. What could be his problems ?
Generally anemones will shrink and open up a lot at first, and after a while they'll get over themselves. I think they're trying to get used to the new water. As long as your perameters are within reason and your lighting is good it should be fine.