I've got two BTA including a RBTA that hosts my clowns.
To get my clowns into the RBTA (they loved my frogspawn) I moved the frogspawn to the rear and put the anmeone in it's place.
They jumped in the second day.
Only problem I have is when the BTA's move around; I have to move my sps out of the way! Gets to be a pain.