Poorly grey tree frog

[Rom]

UPDATE: So both of his back legs seemed to be paralysed now. he's in a hospital tank. Ive looked up what might have caused leg paralysis and MDB was a big one. However, he's always eaten crickets dusted with calcium. He's also always had a UVB light. I highly doubt it's that.

Another theory was a gut impaction pressing against the spine. He's a little bloated right now but has pooped since he's been in his hospital tank. However, he has eaten some larger crickets recently. I usually give him the smaller sized crickets but last week the shop had ran out. I've given him a few dechlorinated warm water baths with honey to be safe.

There are also infections, like Chytridiomycosis or a parasitic nematode. It is a natural, bioactive tank. So foreign, unsterilised matter has been put int the tank. I really hope this is not the case because he his brother is still living in the original tank. I haven't seen any mineral deposits made by the frogs but.. I don't know what id do if they were infected.

His eyes still look bright, and he's breathing ok. There's loose skin around his feet but I did just see him trying to shed in the hospital tank. But he can't move them at all. This all happened seemingly overnight and i'm very stressed out so any advise would be very appreciated