I saw a small flat worm climbing out of a hole in my liverock and want to know if I should use flatworm exit on the tank? He wasn't very big YET but from what I've read here I don't want him to stay. The tank is 55g and has 80lbs of LR and a LS base. I have 2 clowns (1 atm other in QT) 1 redlip benny and 1 flame angel. If I do use flatworm exit will it be ok on the fish?