I have 5 gravid guppies are all within a few days of having fry...except for one is already having them. I have 2 fry right now. I watched them for 5 hours and no more fry but all are still looking very gravid. How can I figure our which one is having fry with out disturbing them? I have 8 fish in there and don't want the fry to become dinner. I do have a breeder plant in there but the 2 fry that were there were not using it. I removed them and acclimated them in to a 2.5 gallon tank. I was worried about my bio filter sucking them up I lost 1 fish and one frog in it already. Should I turn that off and just use my airstone?