Iím starting to discover that current flow causes the reaction regardless of voltage.
Here are my findings:
I started at 50VDC at 2A and went down to 11VDC at 2A. I discovered that the gas production rate stayed very close to the same. So I produced the same amount of gas with 100W and 22W.
Variable transformer with a full wave rectifier and no caps (so technically pulsating DC). I tried halfway rectifying but that it was about 20% less efficient. I assume the efficiency will go up a bit with caps (straight DC).
I kept the current constant by lowering the voltage and adding salt by increments to the system.
Let me know what you guys think.