The Boss Hog 2x micro-pore pond air diffuser is the best air stone available today! It is made from a kiln fired ceramic material that won’t react with your water nutrients. The micro-pore will not break down or clog like many other brands do. It simply creates more long lasting oxygen with the use of prolific small bubbles. Each stone diffuses bubbles to increase root development and overall plant growth. This can be used anywhere increased oxygen levels are needed. For example, in tea brewers, fish tanks, aquaculture, and pond aeration. Includes air stones built in an “H” formation to allow maximum aeration. Requires 3/8” ID polytube and commercial airpump to power these stones.