Hozelock Bioforce pond Filters - Bioforce 18000 UVC - Hozelock 1335 Ref: HOZ1335 Pond water passes into Bioforce 18000 creating a vortex in the top. The water is forced through three specially graded foams which catch particles and hold beneficial bacteria all the way through. This increases the performance of the unit and increases the time between cleaning. Almost solids free, the water passes through plastic biomedia where more beneficial bacteria cleanse the pollutants. Water then passes close to the UV light, separated from it by a quartz glass sleeve. UV light makes algae clump together and sink to the bottom of the pond or get trapped in the Bioforce foam next time round. When the Bioforce becomes blocked this red button will rise up. Water will then bypass the biological foams but still pass the UVC lamp. This signals that the foams need rinsing in pond water. How to install a Bioforce: - Bury the Bioforce up to its lid next to the pond. It is small enough to hide near the pond when it is buried up to its lid. Being pressurised by the pond pump, water can be pumped up from the Bioforce to the top of a waterfall. This makes it even easier to hide. It is best to use a Titan solids handling pump which moves solids from the pond to the Bioforce where they can be easily flushed away. Pond water is pumped up to the Bioforce which is buried up to its lid to hide it. Supplied with 2 x UV Lamps Price: £227.99 (Including VAT at 17.5%)