OASE: BioSmart Pond Filter | External Filter for Ponds 5000g - 10000g | Mechanical & Biological Filtration for Koi Ponds thermostat controller Optional lid sold separately –

Optional lid sold separately – part # WF10L

it prevents ice formation by bringing warmer water up from the bottom of your lake or pond and circulating it in a continuous movement

& better water quality

Diameter of Area Kept Ice-Free

Heavy duty membrane will last for years

OASE: BioSmart Pond Filter | External Filter for Ponds 5000g - 10000g | Mechanical & Biological Filtration for Koi Ponds thermostat controller Optional lid sold separately –Atlantic Watergardens and OASE present the BioSmart external filter. These units are for ponds up to 5,000g and 10,000g respectively, and are an excellent upgrade from problematic pressure filters. Flow through bio mechanical filters clean and clear pond water which returns to the pond by gravity BioSmart is an excellent alternative to unreliable pressure filters OASE BioSmart filters use multiple filter zones to slow water, remove debris and provide