I have one osmolator which keeps the pump running for maybe 30 seconds after the green light comes on. The other osmolators I have used are much more tight. Is there a setting which would allow this to be reduced? I would guess this unit is 5 years old. Its behaved in this fasion from the start. It was not a big deal as the tank was much larger. But now it is on a 30 gal and just puts out a bit too much water. Was thinking there might be a dial inside or something, seems the old osmomate had some such setting. Thanks for any help.