Hi Bob,
I have made a 28% KOH solution which I put into my electrolyzer. It's not yellow like the other ones I noticed, but it's clear like water. When I turn on the electrolyzer, out of the container with water where I dipped the hose fizzes out fog which has a chemical smell. I don't know how the gas isn't clean if it goes through the bubbler and than another container filled with water.
Thanks
Eco