can't remember now what grows well floating or planted. I am finding that my Neons are not coming out as much since my apongea (sp) bulbs died off. I had them for temp. plants till my others grew in better. I don't want to dim lights too much but yet have a section of tank that neons will like by shading it a tad bit. So I'm thinking of something I can suction cup to side of tank and allow to grow on top of water but that doesn't take over like duck weed. Any ideas?