Move the fish to a temp tank. Drain the tank let it dry a few days, fill it, nuke it with peroxide or potassium permanganate. Drain it again let it sit a few more days refill it and recycle it with new midia. Mean while treat fish in separate tank once tank is cycled replace fish a couple at a time so you don't overwhelm the new bb. This should do but a big pita I know.







