It is bit of a lottery with these frogs, but 1500 isn't much to recover.
Bit depends on what was causing the deformities when I had them - I only gave him those frogs earlier this year - if something simple then it could be possible to eliminate and get great numbers from them. And possibly get new morphs all together. ..
I have tried changing a few simple things from diet to environment etc but keep ending up with the majority, if not all, deformed.
Could just be a case of eliminating parasites and or out crossing to normal greens again then back. :dunno:
Good challenge if nothing else.