Join Date: Aug 2011
Location: Kingston, Ontario
Just cories really. The larger ones like bronze cories will do okay as long as it's smooth gravel. Loach do fine on smooth gravel but if you've seen how happy one looks buried in sand you'd probably want them in sand.
All bottom feeders (with rare exeptions like hillstream loaches, which live in fast flowing rivers of smooth rock) generally exist on sand beds in nature, but things like plecos and catfish (excluding cories) can adapt to smooth gravel.
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