Safely Deodorizes and Removes Stains. Fish Safe!! For live wells, bait buckets, fish boxes, ice chests, coolers, thermos jugs, refrigerators & freezers. It cleans algae, mold & mildew, slime, bloodstains and odors. Once rinsed out it does not leave a residue. Just mix this biodegradable powder with water, circulate the pump, or sponge on affected areas. Pump out, and then rinse with clean water. Leaves no residue or odor behind. 4 oz.