Thanks very much for you response! I've checked him over and made sure he's not red or anything. His skin isn't dry and he shed's regularly and completely. Yes, I clean the tank regularly. About once a month (depending on how dirty it is) I clean out everything. I replace the substrate, rinse everything off (real and fake plants included) in hot water (treated so it can't harm the frogs). And once a week I scrub down the their favorite corner with hot water. I'm not sure if it's an aggresion issue, because they seem to get along. Earnest has never bit Olive, that I've ever noticed. They ALWAYS sleep next to each other, so I would assume that's a sign they get along. They also share the only water dish quite well. Earnest moves over when Olive climbs in. I've tried feeding Olive seperately, but even when thrown in with a bunch of crickets, he takes little to no interest in them. They'll hop on his back and he couldn't care less.

Thanks so much for your advice! I'll make sure to keep an eye out for the physical symptoms you mentioned and any aggression between the frogs. =)