LOL All I have to say is good luck!!! The best solution I have for you is to try and frag your Daytrippers off that rock and throw it in the trash... I know people that have: superglued, blowtorched, dipped, baked, kalked, and Joes juiced them and they still came back... I saw a few in one of my tanks, took the rock out and chiseled the spot they were in, and they came back... I threw that rock out... Oh, and be carefull, if you're allergic, they can pack a NASTY whollup... One of my friends gets these nasty blisters from them... They don't affect me as bad...