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I see. So basically the water was being used up and not replaced, which thereby concentrated the electrolyte to far above the initial 8%.

What a mess!

MOYG, I've never seen anything like that. But then I only ever use low concentrations of NaSO4 as my electrolyte, if any at all.

So I strongly suspect it is down to the very high...

I think that what you are alluding to is very different to what people here are trying to achieve, which is basically the production of hydrogen and oxygen... and as much of it as possible.

I have...

I find it interesting that most people simply use a PWM to control the current through an electrolyser in order to maintain the unit at a specific working temperature. In reality of course we want...