AquaCycle Medium Aquaponics Fish-less Cycling Kit Establish nitrifying bacteria in your aquaponics system (a process called "cycling") before adding fish Powdered, soluble pure ammonia, powdered, soluble seaweed, and nitrifying bacteria are all included. Detailed instructions of how the process works & how to fully cycle your system BEFORE adding fish. Includes a Data Tracking Chart so you can follow your system's progress and spot problems early. This kit has enough material to fully cycle systems with fish tanks up to 300 gallons in size.