Hull & Bottom Cleaner - GallonDiTEC's Hull & Bottom Cleaner is a safe, highly effective, and eco-friendly alternative to acid cleaners, used for removing marine growth and mineral deposits from the hull of your boat. It can also be used in closed-coil cooling systems. Hull & Bottom Cleaner is effective in removing growth, barnacles, rust, stubborn streaks, and calcium buildups on all surfaces.Features: Safely removes: barnacles, zebra mussels, scales, calcium, lime, hard water stains, rust stains, and mineral deposits from metal, paint, and glass 3X more effective than phosphoric acid 4-10X more effective than citric and glycolic acid Ideal to be used in concentrated or dilute form An effective marine descaler that contains non-corrosive inhibitors for most metals (not for use on or near aluminum, brass, or soft and finished metals) Non-corrosive when used as directed Not harmful to aquatic life when used as directed Appearance: Clear liquid Solubility: 100% in water pH: