Why does my top plate look like this??

[Fatherjack]

Ran 10L vinegar + 30L water, resulting in everything sparkling clean

Ran 6L fients + 30L water, resulting in top plate looking like this??

The other 3 plates are still sparkling clean

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[drunkmore]

Could that be a bi metal reaction
Just a wild guess. :think:

[MacStill]

I would say it's because it's doing its job removing sulphides, and also first signs of patina ;-)

All the plates in my 6" rig are starting to discolor after a dozen or so runs, so it's almost time for a citric bath and a light scrub up.

The still crow has is an all copper bubbler and before he got it the whole inside of it looked like that, then after a heap more runs it was pretty much black/brown inside which I always put down to sulphides being removed & a natural patina of the copper, so I never really worried about it.

Cheers.

[Fatherjack]

Cheers Mac :handgestures-thumbupleft: