It is hit or miss for the anemone to host any clown including the ones it naturally hosts in the wild. Clowns, captive bred or not, have the instinct to be hosted whether it is an anemone or not. Percula's aren't a natual hostee of RBTA's but it has been done before. Some people think that putting a picture on the tank of perculas living in a BTA help, so you could try that. But remember that it is hit or miss with any clown.