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 surface area for beneficial bacteria
Increase your filtration and decrease your reliance on expensive additives and algaecides