Product Description:
Kent Marine Nitrate Sponge is a granular zeolitic medium which works by two methods. 1) It slowly directly adsorbs small amounts of ammonia that are released by fish and natural processes, and 2) it fosters anaerobic bacterial denitrification due to its physical porous structure. This denitrification slowly reduces nitrate levels in the aquarium. It works well in freshwater tanks or tap water to remove toxic ammonia directly! Nitrate Sponge prolongs the time allowed between water changes by keeping nitrates low!

Directions:
Place Nitrate Sponge in a large mesh (800 micron) bag on top of your wet-dry filter or in a canister filter, where water will flow through the material. It can be used as an excellent media in de-nitrators and other slow-flow applications, and is more efficient in this type usage (see below). Test nitrates regularly. Several weeks will be required to see an appreciable drop in nitrates. (Caution: nitrate testing is the most difficult of all aquarium tests, and many aquarium test kits are inaccurate for marine systems. We recommend that you use the SeaTestTM or FasTestTM test kit by Aquarium Systems® for accurate results!)

Available Sizes: 2 qt, 1 gallon & 50 lb sack