Starbrite Aqua Water Shock Water Freshener Use Starbrite Aqua Water Shock to instantly remove bad tastes or smells from boat or RV potable water. Features Instantly removes bad taste or smells from boat or RVs potable water. Ideal for use after seasonal storage to freshen water tanks. Removes chlorine, sulphur, plastic or metal odor and taste. Provides long-lasting effect, even in extreme temperatures. 1 fluid ounce treats 10 gallons of water NOTE To maintain water quality year-round, use Star b