BIO-DEX CCX04 1 gal Bottle Clearex 500 Clarifier 4 per case. Cloudy and dull water is a common problem in swimming pools and spas. Just 2 oz treats 14,000 1 gals of water. It is especially effective after algae treatments, dust storms or other times the water gets cloudy or loses its sparkle. It is user-friendly, safe and will not clog the filter. Clearex 500 is a professional strength product that is suitable for home use. It's hypoallergenic, non-carcinogenic, non-corrosive and non-flammable. It won't clog your pool or spa's filter and works effectively with all pool filtration systems. Clearex 500 is free of petroleum and is not an oil-based product. You can get clear and sparkling water safely and quickly with this product.