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Isn't the rule of thumb, if half the zinc is gone, replace it?
In Response To:
Hanging Zincs
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If they're holding up, I wouldn't worry about it.
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Hanging Zincs
no...sac up
Isn't the rule of thumb, if half the zinc is gone, replace it?
Please...
Aside from "masking a problem" -- what is the problem with "too much" zinc
Attraction of 'hard growth'