Establishing a healthy biological filter is essential to every aquatic system. Fritz Fishless Fuel eliminates the guesswork of dry ammonium chloride powders and other ammonia sources such as fish food or other organic materials. When using Fritz Fishless Fuel, there is also no need to put any livestock in potential danger to start a system. As a pure liquid ammonia source, easily feed your nitrifying bacteria to establish a robust, healthy biological filter. The convenient dropper bottle makes dosing simple. The Fritz Fishless Fuel formula contains 40 mg mL TAN (total ammonia nitrogen.) Supports Nitrifying Bacteria During a Fishless Cycle. Easy Dose Liquid Formula. Works for Freshwater or Saltwater Cycling. High-Quality Ingredients. Made in USA.