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Yup, did that too. I ran electrolyte in my reservoir, vinegar in my bubbler with a small porous fish tank aerator and out through a desiccant filter. The thing about the vinegar bubbler is that the bubbles never got small enough to neutralize all of the NaOh vapor. So the way I see it is by using a desiccant filter you absorb the NaOh (or KOh) bearing moisture. And, this is more accurate if you are doing MMW measurements because you are only measuring the dry gas volume and not gas mixed with water vapor.
Also, the thing about using aluminum filings: Aluminum will react with NaOh and KOh with water to produce an exothermic reaction with hydrogen as a by product. When the reaction is complete you will be left with a filter full of white powdery aluminum oxide which can be ingested into your engine.
Red Rat, I never said anything about vinegar. Vinegar does not aid in the combustion. Think some more.