A couple weeks ago you were battleing Cyano
in your brand new (albiet used) tank. That indicates water quality issues which MAY be part of your problem. Then as soon as you put you anemone in your tank it started moving about, and the question was asked about your lighting (in the other thread). You never answered and provided this CRITICAL piece of information.
A moving anemone is an unhappy anemone. It could be because of the water quality, or it could be because of insufficient lighting. Or it could be because of something else. But if you wont provide answers, we cannot help.