In article , Allyb wrote:
According to Arizona Aquatic Gardens:

"Lead Weights on your bunched plants: Leave them on or take them off.It
doesn't matter one bit. They are actually made of a zinc/magnesium metal
that is completely harmless to fish and other plants."


Magnesium/zinc? This stuff seems awful heavy to be a magnesium zinc alloy,
at least the ones I have. I won't use it. Color me skeptical and over cautious.

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