Maintain a healthy and clear pond with TetraPond Clearchoice Biofilters. Ornamental fish can overload a pond ecosystem with ammonia and other pollutants. ClearChoice biofiltration removes these contaminants and ammonia using its advanced Trickle Flow and Bio Ring technologies. Trickle Flow filtration is up to 5 times more efficient than filtration in which the media is submerged, allowing the Tetra ClearChoice filters to be smaller in size for a given pond size. Easy out-of-pond accessibility and simple maintenance. Mechanical pre-filter sponges-remove suspended debris to improve water clarity. Bio Ring media provide massive surface areas for beneficial aerobic bacteria to adhere to and multiply. Aerobic bacteria eat the ammonia toxins created by fish waste and decomposing plant materials. TetraPond internal spray systems and Trickle Flow technology disperses pondwater slowly and evenly through the Bio Rings ensuring that there is sufficient oxygen to provide optimal biofiltration conditions. 1.25" drain fitting Interchangeable .75", 1" intake fittings Venturi inlet aerates water and thus enhances bio-activity Tetra Clear Choice Biofilter PF-1 Tetra Clear Choice Biofilter PF-2 Tetra Clear Choice Biofilter PF-3 Tetra Clear Choice Submersible Biofilter 1000 Gallons Most Orders Shipped Out Same Day! Premier Ponds LLC pondinfo@premierponds.com U.S.A. Copyright © 1999 - 2007 Premier Ponds LLC, North Salem, New York. All rights reserved. Thermo-Pond Heater 3.0, Aquascape Designs Pond Kits, ScareCrow Sprinkler, Nursery Pro Micro Pond Kits, AquaClearer, Microbe-Lift, Great Blue Heron Decoy, Pond Liners, Thermo Pond Heater & Deicer, Premium Koi Food, Select Koi, Butterfly Koi, Pond Aeration Pumps, Flexible PVC Piping, BioFalls, Skimmer, Aquascape Pumps, Cat Stop!, Animal Control Products, Pond Netting.