This bio-filter is designed to keep your pond environment beautiful. The easy and secure sealing mechanism ensures positive seal and efficient operation. Product model: PF30 Bio-Pressure Filter + UV Light 13000 Lt Pond UV Globe power:11 Watts The pressure filter with integrated UV is a sealed filter system for the biological and mechanical cleaning of pond water Used in filter cleaning of ponds, fountains and water features It has got the UV clarifier to control algae bacteria from building up and keeps your water crystal clear.