I agree with camaro, coraline seems to grow really well un PC, but not under MH,
I also dose a 2 part Ionic supplement, but besides that thats all I do. as far as the BTA my clowns host in my hammer coral and I doubt they will relocate, however I might a some inverts that prefer the cover of a BTA. The clowns have actually laid eggs and some of them have hatched out and I am trying to raise them out in my fuge. there are pics of the eggs somewhere on this thread.