FAQ: Will Seachem Stability® kill off my existing bacteria colonies?

No.  Stability® does not attack or kill your existing bacteria colonies, nor does it "starve out" your existing bacteria colonies. Stability® does not cause ammonia spikes, and can be added to completely established aquariums with no risk to the fish. The beneficial bacteria in Stability® is much better at surviving adverse conditions than most strains of beneficial bacteria found in aquariums, which means that aquariums which are supplemented with Stability® will typically have a much larger population of the type of bacteria in Stability® than other types of beneficial bacteria.  This is not because Stability® is harming the existing bacteria colonies in any way - it is simply better at surviving and stabilizing your tank.