Putting oyster shells in a fish tank can attract the attention of fish, attract them to nest in it, and also play a certain decorative role.

Oyster shell has the effects of tranquilizing mind (tranquilizing mind with minerals and other drugs), suppressing yang and nourishing yin, softening and resolving hard mass (softening and resolving hard mass), astringing and astringing, and can also be used for treating acid and relieving pain.