I purchased an african clawed froglet about a week and a half ago. He's still only about 1.5 inches long so I keep him in a 8x5x6 tank with a rock to hide behind in about 3-4 inches of water with no substrate. I dechlor the water and I don't use any heating because I read that room temperature is good for them. Here's the problem: I feed him "HBH Frog & Tadpole Bites" about 4-6 pellets once per day like the directions say. He eats them all up very quickly and starts searching for them within about 30 seconds of dropping them in. However, after the first week he developed a bulge on the left side of his stomach after a feeding session. I thought maybe he just ate too much but he had it the next day as well. I did not feed him that day and by the next day it was gone, but he kept pooping out a lot of these solid white stones. So the next day after it was gone I did a complete water change and fed him 4 pellets and he was fine. The day after that(today), there is no visible white stones or poop in the tank and I fed him 5 pellets. The bulge on the left side of his stomach appeared right after feeding once again. Questions: -Are these solid, hard white stones normal? (Urates perhaps?) -Is this left-sided stomach bulge normal after feeding? -Am I feeding him too much or the wrong food? -Anything else I'm doing wrong?