This great smelling formula uses the motion of your boat to scrub your bilge.Pour it in and drain to dissolve scum and sludge. Concentrated formula works in fresh- or saltwater. Fresh pine scent. Environmentally safe, biodegradable. One quart makes 96 gallons.Key featuresDissolves scum and sludgeConcentrated formula works in fresh or salt waterFresh pine scent,environmentally safe and biodegradableConcentrated formula makes 96 gallons