I have my discus tank at 86 and its planted with a bunch of crypt varieties (balansae, retrospiralis, spiralis, wendtii, and tropica) as well as HM, anubias (frazieri, coffefolia, and nana). I have had hygros (sunset, willow) take over. also, limnophila sessiflora (ambulia) did very very well, so well that I ended up removing it entirely from teh tank. I have not had good luck with mosses but my java ferns are holding on in the tank. I also have sagittaria subulata which is doing really well in that tank.