A favored chemical filter media because it will not leach substances back into your pond. Largest adsorption capacity of any phosphate filtering media. Ferric oxide hydroxide-based granules also adsorb organics and other pollutants. Use just like activated carbon; filter bag included. Non-toxic and lasts several months in typical ponds.
150 gram jar is 0.33 lb, includes a filter bag, and treats 150 gallons.
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