Aragonite live sand with millions of nitrate-reducing bacteriaEnsures faster, safer initial cycling and better bio-filtration once establishedFunctional marine substrate increases buffering capacity of your aquariumReal Caribbean live sand in a patent pending breathable bag. Ocean Direct aragonite live sand ensures faster, safer initial cycling and better bio-filtration throughout the life of your reef system. Delivers millions of living bacteria per pound, reduces nitrate, enhances buffering for the life of your system, and discourages nuisance algae. Also aids coral growth and resists the precipitation of carbonate minerals. 77 percent of Original Grade Substrate is, by weight, less than 1 mm in size (most of that are smaller than 0.66 mm). Oolite Substrate is almost exclusively sub 1 mm oolite (most of this will be less than 0.60 mm in size).Used by the foremost public aquariums, research and government institutions, and professionals worldwide. Proven to reduce nitrates. Buffers for the life of the systemDiscourages nuisance algaeBio-coated surfaces resist the precipitation of carbonate mineralsAids the growth of living coralsNo silicaPlease click on "More Information" for directions for use.

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