[The View 5046]

Several years back I would keep one Propane tank turn off until the tank that was open, then when it was empty, I would open the other tank. However the tank would alway run out between 2:00 am and 5:00 am.

I now have a extra 40 lb tank and now leave both tanks open and when the red appears I turn the switch over to the full tank and remove the empty and get it refilled. I always keep a full spare tank.

There is a company making propane tanks that are clear and you can see how much propane is in the tank. But they were only making 30 pounders and below. They are very expensive. Good Luck..