Personal experience, avoid silver dollars and tinfoil barbs, which get waaaay too big for a 20g anyway. They will eat plants. Personal experience with silvertips, they are hyperactive. I love them, but had plastic plants at the time. They were more interested in chasing each other around the tank. Khulis, bettas, mollies, and ADFs are plant safe. Khulis rummage around the substrate, so can dislodge plants that aren't well rooted. And most fish will eat fish fry - including the parent fish. You need to provide some very good hiding places if you want any molly fry to survive.


