Join Date: Jul 2008
Location: Ontario, Canada
it's a 'Thermo' type valve in a painball size CO2 cylinder.
The main reason you can't use paintball cylinders for CO2 with most regulators is because the valve used for a paintball cylinder are different from 'Thermo' type valves, which are the standard for industrial use; and thus the standard for regulators. Believe me, with some ingenuity and a bit of knowledge, it's easy to hook up any pressure bottle to just about any regulator. The only reason there is a market for "Paintball CO2" systems for planted tanks is because the kind of knowledge and the time to rig up your own system is simply not worth it to most hobbyists.
Even with my paintball parts on hand (and I do have quite a bit!) I'd still need to buy a few thread adapters, a remote line ASA and the regulator to make it work.
Simply put: Either buy the RedSea paintball system, or splurge and grab yourself a bottle and a milwaukee regulator. The cost is pretty comperable between the two, as you already have the diffuser.