To prepare a potassium permanganate dip, fill a clean bucket with water and add potassium permanganate until you get a nice dark pink/purple color. Add the plants and let them sit for 10-20 minutes. After the bath, rinse the plants under water and add dechlorinator to the tank, which helps neutralize the potassium permanganate. Be careful not to splash the solution as potassium permanganate may cause permanent stains; wearing gloves is also a good idea.
Preparation for a chlorine dip is very similar to a potassium permanganate dip; however, do not leave the plants in too long as they may suffer, possibly die, from the chlorine. For delicate plants and moss, two minutes in the solution should suffice.