ADFs do flip over on their backs. That is considered normal behavior for them. I'm trying to get a mental picture of what you're describing but I'm having a hard time with it.
If he stands on the gravel and then slowly falls over on his back that is normal. Even if he lays in the gravel, upside down.
But if he looks as if he's having a seizure and then flopping over erratically then that isn't normal at all.
I'm not sure from your description exactly how he's ending up upside down.
That fact that your frog is shedding his skin is a good sign. Leave it in the tank and he will eat it.
A 10 gallon tank is perfect for an ADF. There's no need for you to put him in a 55 gallon tank.
I believe that if you leave him alone while he's on his back he does have the ability to get himself in an upright position again.
Ammonia in the water is BAD. What's causing this? Do a partial water change and get the Ammonia out of the water ASAP. Ammonia will kill him, and is possibly already making him sick.
The two things that you can do for him is to get the ammonia to 0 and to feed him a varied diet.
I'll post a link to the ADF profile in my next reply. There is a short list of other foods that you can feed him.
How long have you had him?
hth
