need info on propane stock tank heaters

[CARSON]

I am looking for info on the propane stock tank heaters if the work good and how efficient they are

 

[Cedarcreek]

I've got 6 of them I'm using right now. How well and how efficient they work depends on the size and type of tank. Tanks need to be partially covered. With a little more detail on what kind of tanks you have I could give you a better idea of how they work.

 

[CARSON]

I have got a big yuke tire with just about half the tank covered and it hold about 800-1000 gallons. how much propane would you go through or how long would a tank last you?
thank you very much for the info
if you need more info on the tank let me know

 

[Cedarcreek]

I've got 2 of them in yuke tires that are 8' across and hold about 600 gallons. They are 2/3 covered. The heaters use about 150 gallons of propane over the winter.