H@rry and Tomoko are spot on, Your clowns hosting it won't help keep it alive.. Its true that they could even end up hurting it if they did host.
Ive got a BTA and my clowns ignore it.. They hang out by a return line.. In my other tank I dont have a BTA, But those clowns host a finger Leather..
I've thought about sticking my clowns in a small tank connected to my system with nothing but a BTA and maybe one rock in the tank.. Just to see if they would knotice it.. I figured once they started hosting it that maybe they would stick to it after I moved them back to the main tank.. But who knows..