Natural Chemistry 5251 PhosFree Commercial Strength Auto Feed - 5 Gallon
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Natural Chemistry 05251 5 Gallon PHOSfree is a lanthanum based formula quickly reduces very high phosphate levels. Natural lanthanum compounds convert soluble phosphates to insoluble lanthanum-phosphate which cannot be utilized by algae and can be removed through filtration. It is the only patented formula that removes phosphates from the filter.