power your stones with an oxygen concentrator perhaps? An old buddy of mine had two of them he used for glass blowing to save cash on o2 for his small torches. I'm sure they cost a bit but he was no money bags so who knows
This is secret stuff so don't tell. Testing the DO saturation in a DWC grow containing root balls and beneficial microbes like in a CC recirculating system exposes the stark failure (to oxygenate) of the O2 Grow oxygenator big time. You would never know this unless you actually tested the DO through the rez water and not many do this at all. The DO meter does not lie.
The O2 Grow oxygenator does not generate enough of that pure 100% oxygen to insure minimal safe oxygenation continuously and DO for the last few plants in the CC circulation system is very low because most of the oxygen has been consumed by plants and microbes. 1st in line from the emitter get the most DO. If the emitter is placed in chilled rez water, it does not run as often and when it does not run, there is no electrolysis, no O2 production... a catch 22 for chilling water when using the O2 Grow oxygenator.
And, there are other excellent, dependable, reliable O2 sources, like PSA oxygen generators…
Where to buy them at great prices.
Many Mom and Pop Durable Medical Companies (DME Oxygen Supply Companies ) are going out of business by the droves in the US now. They are selling their rental oxygen concentrators with low hour usage cheap… $75 - $100 less than 500 hours use.
Also, many geriatric COPD patients die every day and families sell their O2 concentrators ASAP just to get the equipment out of the house and out of sight - $25 - $50 you come and get it today.
Do a Google search, put a wanted ad in the Green Sheet or on the internet net “want to buy good used oxygen concentrator.”
And there are other types of supplemental oxygenating equipment available that are inexpensive, perfectly quiet and operate other than PSA Oxygen Concentrators too.