I have done some research into the product, its supplied by a company called Ixia consulting, they are an engineering design company that does projects in water purification, especially with bio reactors that break down hydrocarbons in water ie petrol, diesel etc. As I understand it, the bio filter part is a spin off from the original purpose of the filter bags they use. Im going to test the bags and see what happens. As Ixia is an engineering company they have extensive data on the effectiveness of the products, and that I like.