Treating a planted community tank for ICH.... HELP!!!

I have a heavily planted, 84 gal tank with Congo Tetras, Black Skirt Tetras, Neon Tetras, Blue Gouramis, a Dwarf Gourami, Zebra Danios, Australian Rainbows, Siamese Algae Eaters, Otos, and a very fat female Black Molly. I felt sorry for her and bought a male Black Molly. I isolated him in a 5 gal hospital tank and after a week or so, introduced him to the big tank. Almost immediately he showed signs of ICH. He went back into the hospital and was treated. Once clear he came back and got sick again! This happened a third time and he is once again isolated and healthy. I figure my only option is to treat the big tank! I plan on using NOX ICH at a lttle under half strength. Any recommendations??? Will the treatment hurt the plants? Pond snails came along with some of the plants. Will the treatment hurt them? Should I also increase the temperature? If so, to what and for how long?

Thanks!!!

NOX ICH is 50% NaCl and 50% malachite green. I haven't begun any treatment of the big tank yet. The male molly is clear and is still in the 5 gal hospital tank. Would you just try the heat treatment or just the NOX ICH or both??? Which path will be easiest on the fish, plants and snails? Thanks again!