Hey there, I am a new tropical aquriamist to the breeding of platys (had tropical fish for about 3 years) and not long after my first batch of babys were born two of my fish slowly started to get extremely skinny. They have hollow bellies and have lost the "platy" shape. When i had my other wish the same thing used to happen and throughout my hours of browsing the net i have not found a fish disese with these symptoms. I have done water changes but i think that one of them is not far off dying. Any help is appreciated.