We have them in a 10 gallon tank with a filter, though I'm not sure what kind it is. My dad gave it to us with the tank I replaced the charcoal today when I cleaned the tank. I have not tested the water. Can I just get a kit at the pet store? What am I looking for in terms of the condition of the water? I did put in water conditioner today when I changed the water.

We have been feeding the grow-a-frog pellets that came with them.

I just noticed that his front legs look reddish underneath. I'm guessing this must be red leg. His back legs don't seem to look red, though. He doesn't look swollen or anything either.