Out here in the country we all have 500 gallon propane tanks.
My neighbor is a Florida Yankee, came up for a few weeks from Miami because his restaurant is closed due to Corona.
Mr. Know It All.

His propane tank shows 30 percent. His water heater is showing a yellow flame not a blue flame. He insists that the problem is due to the low level of the
propane in the tank, there is not enough pressure to run the water heater, and he needs to get more propane.
I told him that the pressure of the propane is plenty good at 30 percent and he needs to clean the pilot light of his water heater probably has dust on it.
Whatever, he needs maintenance on his water heater.

I told him that, he will continue to have good pressure of propane, until the tank runs dry.
Who is right?