Gingerbread Pet Supply Ammonium Chloride Powder is a high-purity ammonia source specifically intended for fishless aquarium cycling. It allows aquarium hobbyists to introduce and control ammonia levels in a new tank without using live fish. This product does not contain nitrifying bacteria. Instead, it supplies the ammonia required for beneficial bacteria (added separately) to grow and establish during the cycling process. Each measured dose of 2.25 grams (½ tsp) per 100 gallons produces approximately 2 ppm ammonia, making it easy to monitor and maintain consistent levels throughout the cycling period.