Hi there,
I've recently noticed a black stain on some part of my mash tun. I clean after a brew with 3% caustic, hot water rinse, nitric/phosphoric 2.5% and rinse with cold water.
This is only a recent thing. Any help would be appreciated
I've recently noticed a black stain on some part of my mash tun. I clean after a brew with 3% caustic, hot water rinse, nitric/phosphoric 2.5% and rinse with cold water.
This is only a recent thing. Any help would be appreciated
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