I have 2 worries....one is how aggressive they will be...I am hoping that as they would be a small/medium mated pair, they may be less aggressive.
My other issue is the anemone moving towards corals.
Can you put a bubble tip on the sand? If not, I might have to put it on a rock ledge which would require me to relocate some corals which would be a pain.
Also, I want to put the anemone on one side of the tank so if they are aggressive they won't be in the middle and disturb the whole tank...better on one side rather than the center.
BTA's are known for wandering, and they usually go to rocks.
You can try to place it where you want, but it could move.
There are alternative nem hosts that are sand dwellars and move less.
Maroons are pretty quick to accept alternatives.
I kept my last pair about 5 years, despite her biting me all the time, and she bit me just about every time my hand was in tank, sneak attacks that often would surprise me, usually when gluing a frag, usually breaking that frag or dropping it when surprised!lol
I eventually just got tired of it.
My picasso's/percs are sweethearts, I'm loving it, 5 year mark coming up on them and no aggression at all.
If you are not into designers, I highly recommend going w/ just plain percs, but if you are set on maroon, give it a try.