Anything I tried with the exception of Java ferns, Swords, and Anubias species really. They all seemed to just melt in the heat. Mad.Lace, Red Lotus, and a host of bunch style plants, several other species of Apon. Eventually I removed one of my halides from the discus showtank and raised its distance form the tank so it would illuminate the entire thing, so lighting was rather low expecially with my level of peat filtration. I made the tank much more like their native habitat(concentrating more on driftwood and rock) and their colors just exploded. I did attach ferns to the driftwood, added some floating style plants(duckweed, and another species I cant remember at the time) and had a single amazon sword.