8 Inch in diameter and one inch deep, Heavy stone will sit on bottom of pond High quality sintered airstone that will give a rich micro bubbles of oxygen. Airflow dependent on depth of Pond and output of airpump.
Sintered Airstone to 1000 degrees
8mm Fitting for airline
Suitable for a large size pond or Koi Pond upto 200L per minute of air
Gives out a fine strean of micro bubbles