Platy Injury

[Aquariumfish912]

My female Mickey Mouse Platy's side appears to be torn up and skin/scales is peeling off. One of her pectoral fins are smaller, as if someone has been biting off of it. She is not acting herself, hanging near the surface of the water and swimming slowly. I have a 55 gallon aquarium with 4 Platys(including the Mickey mouse), 3 Bala Sharks, 1 rainbow shark, 1 Silver Molly, and 2 black ghost knife(and no, they do not kill each other)

 

[leviethan]

could be fin rot. What are your water levels like?

could be fin rot. What are your water levels like?

 

[Aquariumfish912]

Well, her fins are OK now, and she's moving around more, though she still is edgy and leans slightly to one side. There are also some red spots on the Platy. This is all only on one side of her body. Last time I tested the water, a few weeks ago, these were the results:

Nitrate-40
Nitrite-0
Hardness-300
Chlorine-0
Alkaline-0
pH-6.8

My water is pretty hard...

 

[micko]

Have you been treating the tank with anything?

 

[Aquariumfish912]

No.