Laguna pumps are the ideal choice whether you want a powerful waterfall or ornate fountain, and are perfect to use alongside the Pressure-Flo Filters for small to large ponds. Laguna external Pressure-Flo Filters provide mechanical and biological filtration, with an integrated UV Clarifier. Clear-Flo Kits package the Pressure-Flo Filter and a submersible Max-Flo Pump.