Blue Thumb Carbon Clear Activated Carbon, 5 Pounds Stainless Steel Can be used for container

Can be used for container water gardens and other features that contain fish or plants

The solid brass center nozzle is surrounded by eight brass nozzles

Male NPT 3-5 GPM 2" 2

with center opening of 1

These are in an 8" pot

Blue Thumb Carbon Clear Activated Carbon, 5 Pounds Stainless Steel Can be used for containerBlue 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