Rust patch of frag plug


New member
Probably. How is the condition of the coral initially on the plug?

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Member No. 1

Ver. 2.1.1
Premium Member
I would tend to say no to rust. It's only where the frag was glued down. I would guess it's discoloration from the superglue they used.

A Aaron

New member
I’ve thought the same thing a million time. Only happens on argonite plugs most of the time not the full ceramic plugs. I could be totally wrong that’s my observation. Maybe something in the material. It worried me before but hasn’t been a problem