Clam shells?

[ROSSELLA1]

Hi,
I have a ton of clam shells I got from the beach. I was wondering, if I boiled them in dechlorinated water, would they be okay as ornaments?

[aokashi]

i would say the safest is using one small clam shell/gallon. I used shop bought shells. oO. I like to test the effect of things on my snails. if they are fine with it for say after a wekl, my bettas are always fine. If something isn't safe or parameters are off, my snails will hide in their shells and stop moving. I use ramshorns

[Olympia]

Like all shells, clam shells are primarily made from calcium carbonate, and can raise carbonate and general hardness.
One small shell/gallon shouldn't do much damage though :)
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[ROSSELLA1]

Thanks!