Update:
2 days ago I opened the valve and it was leaking a little. I closed it and opened it to the same result. Yesterday I opened it and left it open thinking that may empty the tank. I went out later and it was not leaking. It didn't leak anytime I checked it even after leaving it open all night. The temp got down to 10 last night. Today I opened it and closed it a few times. No leaking noise. After a few minutes I did notice a slight smell. It seemed to be not leaking when all the way closed or open.
I scraped off some of the flaking paint to show some of the bad rust. I'll try to attach pics. I wish I could get the tank replaced, but no RV or propane business near me will touch it.



