putting rocks on glass
If you are paranoid about putting rock onto barebottom glass, cut some 1/4" lengths of 1/2" pvc pipe to make little round discs. Then place these between the rock and glass. Its so thin, you won't see them and it allows water flow under the rocks. You can even glue them down with super glue if you want to stop them from sliding around.
FYI - they will come off (with a pair of pliers) if you ever want to move or rearrange the rocks again.
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If people don't die, it wouldn't make living important.
And why do we fall? So we can learn to pick ourselves up.
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