I have a pair of 1.5" GTs in a 55 Gallon that I wasn't ready for a spawn, well they did and now I have free swimming Fry. I have left the fry with the parents because they are actually really good parents (mother and father swim around with each other and their fry and don't eat em). Question is, how do I go about doing my normal gravel vacs on this tank? I don't want to suck up any fry.