I am using a 28% solution of KOH (1.5 lbs pure flakes in 1/2 gal distilled water). Solution starts out clear but after a few days the bubbler tank turns grayish with scummy floating black globs. Looking at the standard 9 plate 316L dry cell, it appears to have black filaments in it like algae. I have drained and flushed with distilled twice but this keeps coming back. Before I waste more solution I was hoping someone has had this problem and has a solution? Thanks for any input. Want to get this working right because so far, MPG has not changed at all. Will explain in another post, just looking to fix the crapped out electrolyte solution first.