Loss Of Fish, Now A Piece Of Skin Off Another

[Sheridanp]

I just found a dead fish in my filter inlet this morning. It must've been dead for a couple days or possibly even a week. It's eyeballs were gone, and it was all white. I think it was a lemon tetra. Anyway, here are my water tests from last night.

Ammonia- 0
Nitrite- 0.1 (It always says this, it must be the test, all fish are fine in that state)
Nitrate- Didn't test yet!
PH- Steady since I put fish in.

Now, I find a Black Ruby Barb losing a piece of skin, and it is just white. Anyway, I have some Maracyn 2. I think it is a bacterial infection, so would it be all right if I used that. I just finished a 20% water change. Thanks.

EDIT: Ok, I'm pretty sure it is a bacterial infection of some sort. Also, I noticed some of my white skirt tetras have dropsy so I am going to use the Maracyn 2.

 

[WILDER]

I would perform a water change before you add the med, good luck.

 

[Sheridanp]

I did perform a water change before. Anyway, I think it is body fungus. I don't really need help anymore, but thanks anyway.