1 Cubic Foot K3 Filter Media Moving Bed Biofilm Reactor (MBBR) for Aquaponics &bull; Aquaculture &bull; Hydroponics &bull; Ponds &bull; Aquariums by Cz Garden Supply (1 Cubic Foot) * REMOVES TOXINS FAST, EFFICIENTLY to create perfect environments for fish and plant life. Extra-large surface area builds robust good bacteria colonies to purify water of toxic ammonia and nitrites. * PREMIUM QUALITY VIRGIN POLYETHYLENE that is NOT Recycled. Beware of others offering recycled material which can be TOXIC! We only sell brand NEW K3 Media that has never been used before. Colonize essential bacteria for hydroponically grown plants. * 25mm X 12mm or .98in X .47in - 1 Cubic Foot = approximately 7.5 Gallons and covers approx. 500 square feet of surface area. This K3 is extremely efficient requiring less than other designs to create outstanding bacteria. Excellent purification for any Aquarium or Pond. * EXCELLENT FOR AQUAPONICS, AQUACULTURE, HYDROPONICS. Many commercial operations insist on our products for their very high quality and our knowledgeable & honest approach. This K3 Filter Media will help optimize your growing whether you are a business or a dedicated DIYer working from home. * 100% MONEY BACK GUARANTEE ensures this will quickly become your favorite no-risk purchase. Many people are stocking up with multiple bags so they can continue with outstanding K3 Media for months to come. HURRY AND BUY NOW while we have this very popular product in plentiful supply. This makes a great birthday or holiday gift for anyone who has a fish aquarium or hydroponically grown plants. Great for friends, family, and co-workers.