Exotuf Pond Professional Bead Filter specially engineered for the Koi enthusiast with ponds up to 13,200 gallons in size.

Mechanical Filtration:

Mechanical filtration physically removes solids from the ponds by trapping solids between the crevices of the filter media.

Biological Filtration:

Biological filtration is the most effective method of removing toxins (ammonia) and breaking it down into nitrites, and then into nitrates which provide food to your aquatic plants (referred to as the nitrogen Cycle). This is accomplished by using naturally occurring bacteria and giving it a place to live in the Biofilter media where it is exposed to large quantities of food and oxygen.

Nitrogen Cycle:

The cycle begins when fish eat and then excrete ammonia. Bacteria in the biological filter eats the ammonia and excretes nitite. Nitrite is also toxic to fish and needs to be removed.

Another type of bacteria in the filter eats nitrite and excretes nitrate. Nitrate is non-toxic to fish in small quantities and is used by plants as fertilizer. The entire cycle then repeats itself upon completion.