A flow-through filter is fed water by the pump in the pond. The filter is the highest point in the cleaning cycle, located above the water level. From this point the cleaned water then flows back into the pond via gravity, which allows for maximum oxygenation. Special filter foams work to mechanically collect debris, as well as biologically clean the water. After a period of time, within these foams, several industrious microorganisms form and decompose of the excess nutrients in the water.
The advantage to using a flow-through filter is that because they stand above the water surface at the edge of the pond, they are easy to access. Flow-through filters are ideal for medium-size and large ponds, or even for koi ponds. These flow-through filters are just another example of the innovative products offered by OASE so you can spend less time maintaining and more time enjoying your pond.