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small electrolyser
summary quantity of used stainless steel there are 2 square meters.
also, there are, i think, some simple and good bubbler idea - you can use plastic pipes, but connections (connections for vinyl tubing) are made in plastic covers. they are completely flat, and you can screw a counter screw-nut on inside of the cover. so the connection will be very good and strong, not like gluing the connector to plastic cover with epoxy. (i used white teflon band (seen in photo) to avoid leakage betveen plastic cover and conector)
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