FritzPro Concentrated Chlorine Remover is a pH-buffered, sodium thiosulfate-based solution designed to immediately and safely remove chlorine and chloramine from tap water. Instantly removes chlorine and chloramine in freshwater, saltwater, reefs and ponds Simple dosing Concentrated, economical formula Essential for water changes Will not decrease pH in saltwater like competitive products 100% phosphate-free Non toxic to humans, pets and aquatic life Directions & Dosage Use 1 teaspoon (5 ml) per 150 gallons (567 L). 1 fluid ounce treats 1,000 gallons. This dosage will remove 1 ppm chlorine. For water with higher levels of chlorine and chloramine, increase dosage accordingly.