The reason for the butterfly is quite simple. I cannot keep shrimp due to my eel. So to my knowledge that limited me to either a file fish or the butterfly. Both of which are said to be difficult to keep. The butterfly is however a lot more attractive fish Imo. I wasn't quite as clear as I should have been in original post. The butterfly is eating just so far not the aiptasia like I hoped. So why I might not be as experienced as you or others on here. There is usually a method to the madness even if not fully apparent as first. Thanks for you assistance.