Eco Plus Round Air Stone 
 
 
  These great quality Air Stones aerates and adds oxygen to the water in your reservoir or grow system. Circulates nutrients into the water and helps to maintain an even water temperature. 
  -  Aerates and adds oxygen to the water 
-  Circulates nutrients in the water 
-  Helps to maintain an even water temperature 
 For use with 3/16" inside diameter tubing.