How to make your own DIY Aquarium Air Driven Filter & learn The Nitrogen Cycle!

~Nitrogen Cycle The ammonia can be in two forms. Toxic (to the fish) ammonia is in the form of NH3 and occurs when the ph is greater than  ...  Nontoxic ammonia is NH4 and occurs when the ph is below  ...  Ammonia is very toxic to fish. Ammonia is bro