Swimming pools blog

We have an above-ground therapy pool (fairly new to us, still having some
problems with the liner fitting properly), which came with an electric
heater.
The pool is 7 x 12 x 54″. I don’t recall how many gallons it is.
The pool is housed in a portable carport (the kind with tarps all around) to
keep the ambient heat stable.
We are thinking of switching to a propane heater (we do not have access to
regular gas).
Any thoughts or recommendations for product and capacity?
Judy