TJ&LadyDi
RVF "Dinosaur"
Some hot water poured on the tank wall will tell you how full your propane tank is. Liquid propane is quite cold and the hot water will heat the tank wall above the propane but not below. Just run your hand down the tank wall until you come to the cold spot. That's where the propane is.I have always had something like this to keep up with my tank levels. https://amzn.to/37ZZ218
It is not always possible to use them and then I use this kind. Amazon.com : Quick Connect Gas Grill Propane Gauge By Collections Etc : Grill Parts : Garden & Outdoor
The first one is always close to being correct. The 2nd one is a little off some but gives you an idea of what you have.
TJ