A new discovery in Zeolites, a mineral with unique and beneficial properties that have a tremendous affinity for ammonia. A water purifier used to remove by absorbtion harmful ammonia which is most often caused by a build up of fish wastes and overfeeding. Zeolite is also available in C-100 bag units that can be reused recharged by being placed in a glass of tap water with two tablespoons of table salt. Let them sit over night and the C-100 bags are ready for use again. C-100 can be placed into filters, media cartridges or buried in the gravel bed. It is also great for use when shipping or transporting fish or setting up a new aquarium to prevent new tank syndrome. A must for feeder fish tanks which are usually overstocked with fish. Our C-100 comes from the purest ore and is the finest Zeolite on the market! C-100 allows a freshwater* aquarium's biological system to develop without stressing fish. Prevents "New Tank Syndrome" by purifying the water of harmful ammonia. Info from Aq Products