Blue Thumb Carbon Clear Activated Carbon, 5 Pounds Microbe-Lift it is available HERE but

it is available HERE but you must provide the serial number of your Ultima unit

Designed for low energy consumption

Ecofriendly and 100% biodegradable

animal fat preserved with ethoxyquin

Blue Thumb Carbon Clear Activated Carbon, 5 Pounds Microbe-Lift it is available HERE butBlue 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