Aquarium cycling, or the process of establishing bio-filtration for natural ammonia and nitrite removal, has been a long running issue in the aquatics hobby. Actually, establishing bio-filtration with cultured true nitrifying bacteria is a simpler dynamic than many realize. Before fish can be introduced into the aquarium, bio-filtration must be established to later out the toxic ammonia and nitrite created by fish waste.ATM’s Colony establishes this bio-filtration in days instead of weeks with real, commercial grade nitrifying bacteria. Used by ATM, the #1 aquarium builders in the world, Colony comes in two different formulas we use to introduce fish immediately on our own custom installations.Colony for Freshwater contains real Nitrosomonas and Nitrobacter bacteria, which are specific for the freshwater environment. Colony for Marine contains two different real strains specific for marine systems: Nitrococcus and Nitrosococcus. These formulas have proven time and again to be the champions of instant cycling on site at ATM installations. With nitrifying bacteria it is important to choose wisely.Unlike other nitrifying bacteria products, ATM’s biological formulas are regularly used in professional industries such as public aquariums, aquaculture operations, waste water, aquaponics, seafood distribution, and much more.As experience comes at a premium in aquatics, our team has been formulating and delivering nitrifying bacteria longer and better than any other in the world.