Kickstart Your Fishless Cycling Journey Starting an aquarium is more than just adding water and fish—it’s about building a balanced ecosystem. The stars of the show? Nitrifying bacteria, your tank’s hidden champions. They turn harmful ammonia from fish waste into less toxic compounds. If you're new to this, fishless cycling is a game-changer. By adding bacteria and ammonia before introducing fish, you give your tank a head start. Even if you mess up, a simple water change gets you back on track.