The International Open Source Hydrogen On Demand Builders Network.
With such few neutral plates, your voltage per cell is too high. That brown sludge is a result. I recently saw a man named Hans who uses 42 plates to achieve what you are trying. the only way is to increase the amount of surface area to be able to 'lessen' the electrolyte and current draw; he claims 20 amps for 3LPM. (From my experience this sounds correct and feasible just expensive)
For plates and gaskets I have 316L spares - and molded gaskets. Have over 15k miles with no corrosion visible, and about 50 or so plates left. Let me know ;)
man, 2 year old thread....
I'm back to 5 neutral plates.
Have a surface Treatment done too your Electrode Plates. Try " Armoloy Coating " ( 60 Degree Process ).
Or try " Titanium Nitride Coating "
This anti-corrosion Technologies should help you to stop the sludge forming.