aerator

Question
I have two tanks, one at home and one at my office.  For some reason neither aerator is working.  I can blow into the tube and air comes out of the stone so it's not blocked.  The generators are working, too.  When I cleaned them and restarted is when they quit.

Answer
Hi Peggy,
Very odd...
Make sure there is no kink in the airline tubing.
I would simply try replacing the airstones as they can become blocked. And often air pumps will loose some of their power over time as they simply wear out. Some of the best airpumps are the "Tetra whisper pump"

http://www.petsmart.com/product/index.jsp?productId=2753029

I hope this helps!
Karen~