For all ponds a biological filter is a must and for all biological filters, bacteria is the key ingredient to enable the filter to keep the pond clean. We sell a variety of safe, natural bacteria in a concentrated form that will help keep your pond clear of green water algae and help to control string and hair algae. If you already have problems with excessive algae, we sell bacteria blends that are especially suited to control this problem. We also sell a specialty dry bacteria that aids in breaking down and preventing sludge buildup in ornamental, manmade and natural ponds. Whatever problems you may experience in your pond, rest assure that we will have that answers and products for you that will make your pond experience enjoyable.