Whether you use
compressed air or
CO2, you will need to refill your tanks. Many stores will refill compressed air and CO2 tanks for around $3-$6 depending on the size of your tank. Alternatively, many people purchase their own scuba or large CO2 tanks and then refill their paintball tanks themselves. While the initial cost of a scuba tank or large CO2 tank is significant, you can recoup the money with regular use.