Silver dollars with fungus?

[Jolenebailey]

Hi
I have 5 silver dollars in a 260ltr. Two have developed what looks like fungus spots. The first one that had it, the spot actually peeled off him leaving a gash, it healed really quickly but it's now darker than usual. The white stuff seems to growing from under the scales.
Tank has been established for 6 months, and it was just a swap over of tank, so same water and same media was used.
I did have a nitrite spike about 2 weeks ago,
Nitrite 0
Ammonia 0
Nitrates 40.
I have been doing 1/3 water changes for the last 4 weeks but before that for a few months I did hardly any as I had a back injury.
I have been treating with melafix and Pimafix for a week now but there has been no difference.
Any suggestions ??
What about adding salt? Or salt baths, my worry is that they are so skitty that if I take them out it will stress them too much.
Thanks

 

[Mumma.of.two]

So it's either a fungus or a bacterial infection. It can be tough to tell the difference. Fungus is usually white strands or tufts and bacterial is usually a white slime or fuzz. You'll probably need an anti fungal or antibiotic.
Here's a couple of sites that will help you diagnose.
http://www.americanaquariumproducts.com/Columnaris.html
http://badmanstropicalfish.com/fish_palace/tropicalfish_disease_identification.html#ERM

 

[Jolenebailey]

Thanks for that. I have researched both and I still can't work out what it is.. I can't see anything with pics similar. I think I will try an antibiotic