The initial expense is hard to swallow at around 500 bucks.
$325 tank rental, one time fee, and fill.
$150 CO2 controller
$28 regulator and valve. It’s the same as the vivosun for much less on eBay.
The system has been running for three weeks+ and the tank is still heavy as f and the gauge has barely moved.
I am using this in a closet so a grow tent might be even more efficient.
The refills are under $40 bucks
If you can get over the initial expense, the monthly costs are super low.