MARINE PURE BLOCK 8x8x4

MARINE PURE BLOCK 8x8x4

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Ammonia Nitrite and Nitrate Removal Primarily designed to provide deep anaerobic zones for de-nitrification in passive systems. Live rock substitute-popular among reef hobbyists as a substitute for live rock because it reduces nitrates more efficiently without harming the environment. Use in sumps stacked in extra-large filters.


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