Call them and ask!
No, you must have it refilled at a paintball field or pro-shop. You cannot refill paintball tanks from low pressure Soda dispenser C02 tanks.
There are a few places that will fill your CO2. Local paintball stores will, as well as their fields (if they have one). Places that refill scuba tanks will as well. Finally even some hunting stores will.
yes they are refillable
Yes they do
A fill station is a bulk CO2 tank, a fill hose and a scale. They are used by trained air smiths and paintball field employees to refill empty Co2 tanks. First the tanks are purged of all remaining Co2, then carefully refilled and weighed. If you are not trained on how to do this, do not attempt, at the risk of breaking the tanks burst disk or damage to you by the extremely cold gas.
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.
In a perfectly mathmatic world: 4. Realistically 2 and a half just from leaked air and lack of pressure after fills.
At a paintball or sporting goods store.
Dicks, any paintball shop, and Gander Mt.
They need the small sealed CO2 cartridges, not the screw on tanks. but yes they need Co2 to function.
drain the tank, throw it away
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 To be honest though CO2 is well out of date.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.