magic Posted December 28, 2005 Report Share Posted December 28, 2005 Is it safe to use oyster/cockles shell to buffer PH as my concerns is that shellfish might contain high concentration of mercury. Quote Link to comment Share on other sites More sharing options...
wandj Posted December 28, 2005 Report Share Posted December 28, 2005 Are you thinking of using the kind of oyster shell that is given to chickens? I don't know about the Hg question, but I would hope they wouldn't be feeding chickens something dangerous as it would wind up in us! Quote Link to comment Share on other sites More sharing options...
jvision Posted December 28, 2005 Report Share Posted December 28, 2005 I'm pretty sure that the Mercury is only in the soft tissues of organizms. Quote Link to comment Share on other sites More sharing options...
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