Hey,
Can anyone help m diagnose what's wrong with my platy? There's a white lump on his side but he's also ballooned out on that side too?

There's a few possiblities I can think of but, in order to get a better idea of the situation, it would be helpful to know:
* how long this has been present;
* is the fish behaving any differently or appetite different to usual;
* what your readings for ammonia/nitrite/nitrates have been lately;
* filter maintenance regime;
* tank temperature;
* PH and water hardness levels;
* size of tank and other occupants.
Thanks. :)