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Old April 19th 06, 04:27 PM posted to rec.crafts.pottery
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Default Making clay caves for aquarium fish...

i don't think they'll work, but you can try some home testing to see if
obvious stuff happens - like does it melt in water? etc.

pick a clay you're curious of, make something, and BEFORE adding it to
a tank of water, check the water for basics like PH and calicum with
regular swimming pool water test kits.

assuming your piece doesn't melt in water, confirm the piece doesn't
shift the water properties like PH & calcium, etc.

see ya

steve

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