Microbe-Lift 4-Ounce Bacterial Starter Kit, 4-Pack Bacterial aquarium balancer 4-ounce-odor free to prevent new tank syndrome and to help eliminate ammonia and nitrate Gel filter cartridge inoculant 4-ounce - spread directly on to your filter pad or media to immediately establish biological activity to stabilize aquarium environments Nite-out ii 4-ounce-nitrifying bacteria which is reef, freshwater, and marine water safe specially formulated for rapid ammonia and nitrite reduction Gravel and substrate cleaner 4-ounce-natural and non caustic reef, freshwater and marine water safe to provide rapid and natural sludge removal