Fin Problems

[moohug4]

So my one red wag platy is always in the corner (Top right) and he always has his fins clamped up against his sides. I'm not sure if this is a problem, but I'm beginning to get scared.
I Just recently lost one of my red wag platy's to dropsy, so I'm curious to see if that might be the cause.

Any advice is great, thanks.

 

[starscream]

How close to the top? Is he swimming at all? If he tries to swim down does he float back up?

 

[loraxchick]

What are your water stats for ammonia, nitrite and nitrate? Do a big waterchange and see if there is improvement.
Any other symptoms? flicking rubbing or darting, loss of color, white stringy muscousy poo, thinness or bloating, any spots on the fish, spitting out food, trouble maintaining balance while swimming?
Might be helpful to diagnose potential problems if you give detailed description. Pics would be very helpful as well.
all the best
cheers