Alex I have a 20 gallon that only has a 17 watt light, and the plant choices are severely limited. Plants that have done very well in my tank: crypt wendtii, crypt retrospiralis, onion plant both dwarf and regular, pennywort, anubias, java fern, marimo (moss) balls. I attribute some of the success to my Eco Complete substrate and ensuring my light bulb has the right spectrum (6500K or higher). Java moss, anarchis, hornwort, and other "low light" plants did not do well.