Yep, Activity those will do fine. You can go so far as to attach a small flexible valve to the CO2 cartridge & assembly and position it upwards, but it is not required. As long as the SMB is upright (and it would be that way if used the normal way), it will fill.
No, they can not be refilled - I used to buy a pack in bulk. Not that expensive - no idea what they would cost in your area. Go to the car parts suppliers - there you can buy loose cartridges substantially cheaper than at any dealer. If you are going to be using the DSMB often, it might work out cheaper to go the dedicated DSMBi way - but not so compact!
My model submarine ballast system uses the 16g CO2, that's why I bought in bulk!
Last edited by NamTinker : 24-08-04 at 10:36 PM.
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