Your fish can enjoy a healthy environment and you can enjoy a more efficient water filter when you add this insert to your aquarium. By reducing the ammonia and nitrite levels in the water and encouraging the growth of healthy bacteria, the insert helps your AquaClear 20 Power Filter keep your aquarium water clean and safe. Expand the filtration efficiency of your AquaClear 20 Power Filter with this AquaClear BioMax Filter Insert. The insert provides an optimal environment for the growth of beneficial bacteria and also helps reduce ammonia and nitrite levels to help expedite your filter's work. Designed for use in both fresh- and saltwater aquariums, the insert helps keep the water safe for all of your aquatic pets.

• Works with AquaClear 20 Power Filters to provide efficient biological filtration
• Helps promote beneficial bacteria growth and reduce ammonia and nitrate levels
• Supports a healthy environment for your fish
• Ideal for use in 4.8 – 20 gal.(18 – 76 L) aquariums
• Safe for fresh- and saltwater use