I'll start off by giving a bit of background info, letting you know what other fish are in the tank, size etc.
Size: 96 Litres, 4 months old
1 x Ender Guppy
11 x Neon Tetras
2 x Golden Barbs
3 x Honey Red Gouramis
6 x Male Guppies (There were 3, but an additional 3 were added yesterday).
Fluval 2 Filter (I can be more specific if needed)
No live plants
Last water change was 25% last Monday
I'm not sure about pH levels though, every time our local shop has tested the water, they've said it's fine. If pH is relevant to this query, I'll see what I can do.
Until relatively recently, I had 2 Pakistani Loaches in the tank, but they were nipping at other fish and actually ate a couple of Ender Guppies and a Tetra so they were returned to the shop.
My issue is with one of the Gouramis, around the time the loaches started misbehaving (it could even have been before), I noticed what looked like scales flaking and whitish marks appearing on the skin. I contacted the shop who advised it was nothing to worry about and adding additional API Stress Coat would assist with the healing process. They did however say I should monitor going forward, in case things got worse. Unfortunately, it looks as though they have, the white marks are now pink and it looks as though chunks are missing!
Here are some pics, I apologise for the quality, but it's pretty hard to get a decent pic of them on my phone. Hopefully it's enough to give you an idea of what's up.
Any ideas what I can do/what would have caused it? As I say, the Loaches were causing problems nipping etc, but have since been removed. Is it possible they've taken a bite?
Other than that, he seems relatively healthy, he doesn't seem stressed and he's quite happily interacting with the other Gouramis in the tank. I've had a Gourami pass before and you could tell for days something wasn't right, he just hung about on his own at the back of the tank, this guy is exactly the opposite.
Looking for a bit of help please.
Edited by El Presidente, 15 April 2012 - 04:22 PM.