Tetra Easy Balance with Nitraban Water Conditioner for freshwater aquariums offers a number of benefits, including: reduction of phosphate; stabilization of pH and KH; and replenishment of essential trace elements and minerals. Nitraban adds nitrate reducing granules to the water. The white biodegradable granules settle into the gravel where they are broken down by bacteria. The bacteria consume nitrate, which reduces food for unsightly algae in the aquarium. Regular use of EasyBalance reduces frequent water changes by keeping aquarium water biologically and chemically balanced for up to six months. Treats 500 gallons. Shipping weight: 1 1/3 lbs.
I've used this product before and seemed to have success. I like that this product comes in such a large size for the money. I have yet to test my nitrate level, but from past experience I think it should at least have some effect.