"Laguna" make, Pressure-Flo Pond Filter System PF 5000 and a Pond Pump ?

The Pond Pump sends the water through to the "Laguna" Pressure-Flo Filter where the water goes through 4 foam filters and biological filtration and then passes a UV-C lamp which exposes water to ultraviolet rays that inhibit algae growth. Once cleaned the water flows back into the pond..