the playsand works fine, silicates (sand will not dissolve in water) as for crushed oyster shells be cautious, they are very high in phosphates and these can be released in our environments.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
Some strive to be perfect.... I just strive.
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