Calcium is used in water for two things
lowers the freezing temp
makes the liquid solution heavier
You could use sugar to get the same effect of making a heavy solution, but, there would be a lot of tractors stolen by bears because of the sweet tires..
Another way to add fluid if you do not have a pump, is to siphon in the fluid.
Each foot the fluid is raised above the tire will cause 1/2 psi pressure.
6 feet of height (hang the bucket from a rafter in a garage) will create 3 psi.
When the flow slows down, pull the hose off the valve, the 3 psi of air will come out of the tire, put the hose back on, continue filling.
I have a 8 foot length of gas line that fits over the valve stem perfectly, it is kept just for tire filling.
You could put the bucket on the roof 30 feet high, then you would get 15 psi, but I have found that my wife gets tired of carrying all that fluid up the ladder and up the slippery metal roof!!
