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I guess you dont have a BBQ grill?

By feel.

And by the condensation on the sides sometimes.

Yes I have a grill but the small bottles are either mostly full or almost empty. In between I have no idea the difference. Even tried the level gauge strips and the gauges but none were accurate. I would never be able to judge a quarter of a tank is what I meant.

The gauges are garbage. I tried them too.

I grew up around propane since my Dad works with it.

I got used to just picking it up, shaking it and telling how much is in it.

@thediyworld kind of how you supposedly can tell if wild water is safe to drink just by looking at it huh? that video was hilarious and full of misinformation...

The drinking runoff water was by far my favorite video. A man who claims to be a DIY know it all AND a prepper makes a video showing water on the ground and washes his dishes in it then fills up jugs to take into the house and to top it all off dips a mug into it and drinks it and says its fine. No testing for hamful bacteria and not tablets to decontaminate it and no boiling it as everyone else knows to do. Then he stayed sick like forever but never associated drinking runoff water with harm to his body. He never read that in places where people do drink contaminated water their bodies have gotten used to the bacteria and it does not effect them as it does people that are raised drinking municipal water that is tested and treated for bacteria. He is an idiot