or you could put the large borader rock on the sand and not worry about it. it is not likely that anything we keep in our tanks will burrow enuf to tople rocks if ou put large ones on the bottom.
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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