You never know with these crazy guppies. Just keep lots of plants in there and look every morning for fry. I have one female that, while constantly pregnant, is just plain fat as well! She has looked about ready to pop for two weeks now. Did she have babies last night? Nope, my black moscow whose belly is not even noticably smaller today had about 30! Amazing. She didn't look pregnant at all. I know it was her too, because she was in a separate tank. I really wanted those black moscow fry