Free shipping applies to all domestic orders. Orders are processed and shipped during regular business hours (Monday through Friday 8:00 am to 5:00 pm EST, excluding holidays).
Save an extra 20% off your entire order with coupon code: MARCH20
*May exclude certain brands.
**May not be combined with any other offer.
Code expires Saturday, March 15th 2014
|Kent Marine Nitrogen Sponge - formerly 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!|