Looks like you are bubbling air up past the washers? Good idea.
I've seen pics of designs like this but they used holes in the plates to let the air through. Usually vertical surfaces are used to help remove the HHO bubbles?
Seems this is an issue for good gas production...getting the already formed bubbles off the plates because they act as insulators and prevent further reactions. One guy claimed a production boost by using a small ultrasonic generator on a cell.
I think you ALWAYS want to use a bubbler after the cells?
Not being critical...just talking what I've read. At least you've built one.
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Leading the perpetually ignorant and uninformed into the light of scientific knowledge. Did I really say that?
a new policy....I intend to ignore the nescient...a waste of time and energy.