I had the same problem, i had two false percs and i introduced an LTA and wouldnt go near it.. 5 months later I took the chance and bought a clarki clown that i saw hosting in an anemone in the store.. the clarki clown hosted with the anemone and eventually the 2 percs became aggressive with the clarki and one day kicked the clarki out.. i then caught the clarki and brought him to the fish store, i felt awful because they were picking on him.. It was a lesson learnt for me but my clowns have recently began hosting with it....