About Fishless Fuel 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.) DO NOT USE FISHLESS FUEL IN ANY SYSTEM CONTAINING LIVESTOCK. DO NOT ADD ANY ANIMALS TO A SYSTEM THAT HAS MEASURABLE AMMONIA OR NITRITE.