It depends on where you take it. I live in Georgia and go get my tanks filled at Dicks. In Canton the price is $2.99+tax for a 9 oz, and 3.99+tax for a 20 oz. And in Cumming it is 1.99+tax for a 9oz, $3.50+tax for a 20oz. So it depends by store but I would take it to Dicks because they have been the cheapest place I have found.
No I went 4 hours straight on just a 9oz. tank
If it has threads on the top, you refill it like any other tank by taking it to a sporting goods store or paintball field. If it does not, then it is a disposable, and you cannot refill it.
Dicks, any paintball shop, and Gander Mt.
Yes, every few games, you will have to refill the tank, depending on the size. Without it, there is nothing to propel the paintball.
size is all personal preference, you can get something as small as a 9oz or up to a 24oz co2 tank, the larger the tank is the more shots you will get off of it but the heavier and larger it will be
Call them and ask!
The tank, has nothing to do with accuracy what so ever.
Take it to a shop! if you want to do it yourself the normal way is to put the bottle on scales and fill it from a larger bottle to a fill weight. To be honest though CO2 is well out of date. A smart move would be to move onto compressed air.
No, paintball co2 is much higher pressure.
No paintball gun will work without a CO2 tank or other propellant tank. without Co2 there is nothing to push the ball out of the barrel.
Where the air tank or co2 tank normally attaches
No, the FPS will stay the same. The size of the tank determines how many shots you can take before you have to refill it.