Hey y’all ! New to this hobby I currently have Cory cat fish with glo fish gravel and have learned that’s too rough for them, but it this gravel okay? Or should I look toward something else ? I also have tetra and barb in that tank thank you!
Is that gravel white? Even if it's grey it looks very light in colour and fish prefer a darker substrate. Few fish have evolved over very light substrates - that's why they are dark coloured when you look down on them, so they blend in with the bottom of the river/lake and birds can't see them as easily.
You should get smooth sand for Corycats, as Naughts mentioned. In addition to a Corycat's feeding habits working best with sand, Corycats are more prone to barbel infections if kept on gravel. I have Super Naturals Aquarium Sand and it works well. You want a smooth sand so it doesn't damage their barbels or scaleless tummies.