Platy....sick getting smaller, hiding and bent spine?

Question

I have a 30 gallon tank with 2 sword tails, 3 mollies and I had 3 platys. I check my water and do partial water changes.....my levels are fine and my tank is clean. All my fish are doing great except my platys. I had one die 3 weeks ago it was fine one day and then the next it was swimming sideways and then just died over night. Now I have another platy that has been hiding and not eatting (although he ate a small bit last night) he seems to be getting smaller and losing some of his bright colours (sunset platy) and now it appears his body is bent (a slight c shape) He has no marking..no sores....can not see any bugs.....What could this be?

Answer 1

How is it's poo? It really does sound like internal parasites. I had my last standard orange platty die of the same thing recently. No matter what I did including treating with broad spectrum antibiotics helped her at all.

Personally if you can,  I would put her in a QT tank. The less she can contaminate your big tank the better for your other fish.

Answer 2

You best bet is to look online and see if ther are any desiease that cause wat you see.