Fleck 5600 12 Day Timer 9" X 48" 1.0 Cu. ft. pH Neutralizer
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Calcite media is used to neutralize pH levels that are acidic (pH levels less than 7). Calcite is calcium carbonate which automatically self-limits the dissolve and stops at a pH level of 7.
9X 48" pH Neutralizer has a flow rate of 10 gallons per minute (GPM).