The things that be tested for, along with the errors of a new reefer. Anemone along with some of the more difficult corals just do better in a mature environment.
Your tank is mature so there should be no problem BTA . Just let them settle in leave them alone they will find there own happy place . No need to feed at the beginning. I only feed my BTA once a week with mysis. They may even hide in the rock when first put in this is normal as well . BTA imo are quite hardy unless in none mature tanks . My nems do well in moderate flow. Lighting medium to high sometimes you have to start off medium light and slowly ramp up higher over time . This is mine just took this photo
Can I remove the part of the anemone that splits or will that rock the anemoneKeep in mind they split, some way more than others.
Also they may not like the rock and move.
Stability of flow and water movement will help keep them from wandering.
I have a purple tip Nem and a pair of breeding clowns in my 30g remote.
If you want clowns this is a better Nem option, imo.
You should be well ok to introduce, but acclimate well and introduce under lower intensity and even shut pumps off (optional) to allow it to establish its foot in a happy spot.
When they slit its a new Nem so you need to find it a home. Most lfs will take it.
