Aqua Ultraviolet AAV50011 Ultima Ii 10000 Filter, 5bxs To support aquatic life whether at an Aquaculture facility, backyard pond or Large Aquarium system The most efficient way to accomplish this is by installing an ultima ii biomechanical Filter. The patented media has the highest biofilm surface for bacterial growth, this beneficial bacteria converts ammonia into harmless compounds. This action blasts the media apart, then lifts and spins it, separating the waste and flushing it away The Ultimate II patented tubular media design has the highest surface area on the market to grow beneficial bacteria These bacteria break down fish waste, creating a safe healthy environment This action blasts the media apart, then lifts and spins it, separating the waste and flushing it away The Ultima II patented tubular media design has the highest surface area on the market to grow beneficial bacteria