Blue Thumb Carbon Clear Activated Carbon, 5 Pounds Atlantic Water Gardens Circle Diffusers (Pro Kits) —

Circle Diffusers (Pro Kits) — Weighted diffusers produce medium bubbles and reduce back-pressure

These replacement impeller kits are for use with the Aquascape® AquaSurge® PRO line of pumps (2012 models and later)

Best of all Typhoon Air Pumps are easily rebuilt and exceptionally efficient

The filter works excellently with low-amperage pumps

Available in a wide variety of stains and paints (see additional photos)

Blue Thumb Carbon Clear Activated Carbon, 5 Pounds Atlantic Water Gardens Circle Diffusers (Pro Kits) —Blue Thumb Carbon Clear is a bituminous coal exposed to extreme heat, which "activates" the carbon giving it a powerful ability to absorb chemical pollutants. The billions of pores within the carbon act as hundreds of sponges soaking in many pond pollutants such as tannin, ammonia, nitrite, and nitrate. The result is a polished, healthy environment. Includes mesh application bag Safe to use around aquatic life Treats up to 2,000 gallons