I got a flow gauge but no controller for it so what I was doing was going in right after the lights came on then blasting the room straight from the tank with the fan controller set to let the heat get up to 90+. Then I'd go down a couple hours later and run the exhaust fan to cool the room to about 75 and do it again. Just during the stretch for an experiment and the plants grew like crazy. Tank ran out just a few days after the stretch. I'd like to get the controller and set it up right but no spare coin for that.
I used to drive propane truck and refill bottles that we re-certified if they were past there date code. I'm supposing they do the same with these welding tanks. Guess I'll find out when I take it in.
This is the tank I have with the flow gauge on it beside my DIY nute chiller and some unruly plants in DWC a couple years back.
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