My tank is 20 gallon and I have, a guppy, 5 danios, a white cloud, pleco, catfish, gold tetra, 2 glass fish and three blue tetras. Will they eat the frys once they are born. I looked at her belly and don't see any black dots. She's a silver molly and is really big and she sits a lot in either the rocks or a cave that I have in the tank. I had a male one, but he died the other day, and he was small and had less fins than she does, that's why I think she's pregnant. I only have about 4 plants in there so based on what you said maybe I should get some more plants, but I really would like the frys to live.