Nitrate Sponge - 1 gal bucket

Kent Marine Nitrate Sponge is a granular zeolitic medium that works by slowly adsorbing small amounts of ammonia that are released by fish and natural processes. It also fosters anaerobic bacterial denitrification due to its physical porous structure. This denitrification slowly reduces nitrate levels in the aquarium. It works well in tap water to remove toxic ammonia directly.