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I have a 30 gallon tank with quite a few fish in it, including one little leopard cory. He seems very healthy, and is active, constantly swimming around the tank looking for food. However lately I have noticed that he is swimming to the leaves of some of my crypts and resting on them for some time. I have read that cories don't do too well with a rougher substrate, which my flourite definitely is. Should I move him to my other tank where there is a much smoother, fine gravel substrate? Or is he just exploring and I'm worrying too much? He is my first cory, so I don't want him to be unhappy in his tank!

too rough substrate for Cories is a common problem. However the very fact your cory likes to spend time laying on some leaves, and not on the substrate itself does not say much: some cory species prefer to have a broader view, others like the hid themselves, or bury them

My C similis spend the first 2 weeks in a cave, my wild caught highfin C paleatus now bury themselves in the sand. They never did so in the past 2 years, but perhaps this is due to them haven laid eggs.

The main thing with too coarse a substrate is damage to the whiskers. If these are OK, the fish is Ok and the substrate will do too

His whiskers look great, they look just like they did the day I got him. I actually selected him because he was the healthiest looking and most active cory at my LFS, and so I think he was in good shape then. I'm glad to hear he is comfortable in my tank.