Yup! I do disinfect plants and things before placing them in any of my ponds. I even disinfect them from stores or other peoples ponds. Potassium permanganate at a rate over 25 times the rate for fish is used here. It wipes out most anything including algae. A couple of hours at such a high rate even wipes out snails and leaches. After the pp bath I just rinse them off and they are ready to go.