Oase BioSmart 36000 Pond FilterThe Oase BioSmart 36000 (formally known as the Biotec 10. 1) is a top of the range mechanical and biological filtration system for your pond. It is a flow through filter, meaning that is has many advantages including the rich supply of oxygen to your water. There are many factors that can increase the toxin levels in your pond, including excess fish food, fish excrement and decaying vegetation, all of which need to be dealt with efficiently to stop