Blagdon Pro UVc have been designed for larger ponds. There are four models within this range and any number of units can be connected together via optional wide bore link pipes allowing you to expand the system for future expansion to meet your changing needs. Why use UV systems? - UV helps improves a fishes chances in fighting bacterial diseases or even parasitic diseases such as Ich. - UV Sterilization is effective for controlling suspended algae (green water) in ponds along with proper filtration, leaving you with a clear view of your fish . - The UVs come complete with multi hose tails, female solvent waste 1 1/2 \" sockets and an advanced power compact UV lamp system which allows twice the UV light output in the same installation area compared to conventional linear lamps. Product characteristics at a glance; * Eliminates green water giving your pond a crystal clear look. * High output All fittings are included * Unique expandable system enabling future simple expansion * Low running costs