I found these pieces of DW yesterday while walking by the marsh. They have marsh mud on them. I thought I could clean it off by hosing them down, but it's pretty embedded in the wood. It doesn't come off if I touch it, but it is enough residue to give the wood a grey tone (and marshy smell). My question is, is there a way to clean this properly? Scrub it? Should I just toss it? Would it cause any problems in my tank if I decide to use it?
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