The Bioforce 4000 consists of 2 Bioforce 2000s and a tandem connector. Adaptable inlet and outlet hosetails enable connections to 3/4", 1", and 1-1/2" tubing.

For koi and fishponds up to 4000 gallons
Maximum water flow 2000gph
1" or 1-1/2" metric tubing recommended

For more info click “Technical Specs”

• Filter can be almost completely hidden by burying it up to the lid
• Because of pressurization, Bioforce filters hold more beneficial bacteria than other same size filters
• Foam disc support plate encloses plastic biomedia – home for billions of beneficial bacteria
• Graded foam removes more dirt particles as the water passes through. Because the water is pressurized the foam retains more beneficial bacteria without becoming blocked.
• Water can be pumped from the Bioforce up to the top of a waterfall
• Quick snap release UV lamp to eliminate algae and improve water clarity
• "Turbulator" molding spins water around the UV lamp for more effective elimination of green water
• Cleaning indicator rises when filter needs cleaning