Used regularly, TetraPond Water Balance maintains optimal water conditions by stabilizing pH and carbonate hardness (KH). This effective formula restores essential vitamins and minerals that are lost over time. Reduces phosphate nutrients and supports plant growth and other beneficial natural processes. Use TetraPond Water Balance to keep your pond water healthy and biologically balanced! Dose 10 ml for every 100 gallons of pond water. For outdoor ornamental ponds only.