Mines don't bother clams but I haven't gotten thenm to take prepared foods yet.. I've had them for 4 month's now.. I got them to simulate polyp extension as it is in the wild mostly at night.. This way I could see more of my coral colors in the day cycle.. I have over 50 acros in my tank and they only seem to go for My Greg Hiller Aquadelight
acro and my supergirl monti.. If you don't offer them a variety they will die in a month..