I have german blue ram fry (couple days old) right now. I just went over to check on them and noticed a few (very few) small white 'worms' crawling around in there. They are VERY tiny. There is nothing in this tank but the babies and a java fern. No substrate. Is this planaria and is it harmful for my fry? I read they eat algaes and decaying fish... they wont harm my fry tho will they? I've been leaving the tank light off a lot because the fry seem to like it better with the lights off.. I read that planaria dont like high lighting.. if I keep the lights on.. will that kill them (I'd like to get rid of them) I'm going to do a water change, but I cant use a gravel vac cause I will suck all the babies right out. (GBR fry are TINY.)