ick looks like tiny snow flakes floating in the water.. and on the fish.
the best, and simplest treatment for ick is to raise the temp to 88 degrees and add 1 tsp salt per gallon, also add an air stone or bubbler to add oxygen. as the water evaporates add fresh water.
in 10 days do a 25% water change and restore 25% of the salt. repeat in another week or 10 days..
by then you should see no signs of ick in the tank.. and your fish will most likely be fine and that amount of salt shouldn't harm your plants either.
after you see no more signs of ick, do 25% water changes every week and drop the temp 2 degrees every week until you get it back down to where it was. And don't replace the salt. In about 4 or 5 weeks there should be nearly no salt left in the tank and your temps should be back to normal and you should have no more ick.