Run Out Of Air Pumps?

before i start, i appologise for the modified pic

ok, so heres an easy way to create an air stream in your tank....

As you can see, drilling a hole in the top of the filter head and pushing a piece of air line through (which needs to reach above water level for air to get in) will create a simple way to oxygenate your tank

jsut as a warning, it is probably better to detatch the head of the filter from the body before drilling a hole, as you can see where you are drilling too.