Providing safe drinking water from well springs and other untreated supplies. Incorporated into water filtration and treatment plants Fish farms for the control of micro-organisms Algae control in ponds and general aquatic use Recirculating loops and high purity water systems. Sita SE UV water Filters are designed for low to medium flow rate applications. The lamps offer a full 1 year lifespan and inexpensive replacement costs.The SE Range features the latest high frequency lamp driver circuitry with lamp operating failure warning lights and audible alarm. Construction : 304 Stainless Steel 8000 Hour life high output UVC Lamps.