Piece of metal in my ro reservoir


#1

Ok so I just noticed a piece of metal in the bottom of my ro reservoir and it is rusting. Some of my plants burn real easily on the sides and are yellowing with rust colored spots. On some of the older bottom leaves it looks like the leaf is actually rusting. Think there’s any connection or does it sounds like a k deficiency?
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#2

Short answer is looks like k deficiency but excessive iron can cause the plant to not take in the k so it’s not as cut and dry as that