TeeJay Posted May 23, 2022 Share Posted May 23, 2022 (edited) I was thinking of adding a group of pygmy Cory's to my 29gal guppy tank. My substrate is gravel. I have heard it's better to keep them on sand. Will they be ok on rocks or will it it hurt there barbels? Edited May 24, 2022 by Uttjrt3 Link to comment Share on other sites More sharing options...
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