Somethings Wrong With My Neon

[Mikaila31]

I have six neons in a 55gal. with 3 long finned danios, 2 corycats, swordtail, 3 ottos,and 1 sparkling gourami. About a week ago i was changing the water and i unpluged the heater and then i forgot to plug it back in !. The next day i came down to a cold tank. I turned then heater back on and let it warm the tank back up. A couple days ago i noticed one of the neon was acting strange. He's not schooling with the others and stays in the same spot all day. His color is also lighter than the others and he has a few pale spots on his tail. What is wrong with him?
Neon

 

[Durbkat]

He could have NTD (neon tetra disease). But just wait for someone else's response.

 

[Bloo]

Fantastic picture ! Pity that it's of a sick fish though it looks like the top scales are distended which could indicate something like dropsy (bacterial) but I would expect the see the distended scales all over though.

I'm not sure really. Could be bacterial, but before deciding to treat, wait and see what other say.

 

[Tokis-Phoenix]

Yeah i'd also say its most likely a bacerial infection, perhaps the beginning of dropsy as some of the scales are sticking up a bit on its back- best to start medicating with an anti bacterial med like pimafix right now, the discolered patchs look like a slime coat disorder which is a stress related condition, most likely in this case brought on by the vast temp fluctuation.

 

[SRC]

I don't think that it has NTD

During the initial stages, the only symptom may be restlessness, particularly at night. Often the first thing an owner will notice is that the affected fish no longer school with the others. Eventually swimming becomes more erratic, and it becomes quite obvious that the fish is not well.

As the disease progresses, affected muscle tissue begins to turn white, generally starting within the color band and areas along the spine. As additional muscle tissue is affected, the pale coloration expands. Damage to the muscles can cause curvature or deformation of the spine, which may cause the fish to have difficulty in swimming. It is not unusual for the body of the fish to have a lumpy appearance as the cysts deform the muscles.

Rotting of the fins, especially the caudal fin, is not uncommon. However, this is due to secondary infection rather than a direct result of the disease itself. Bloating is another secondary infection.

It's probably just got stressed from the cold water, neons are notorious for being sensitive. I would move it away from the others though..in case it has gotten sick, so it doesn't spread.

It's been my experience with neons..that when they isolate themselves and start "hovering", as I call it, they will soon be dead...regardless of what you try to do for them.

They are such sensitive little fish (even though at first they may seem quite hardy), and generally once stressed...they die before you can even attempt to medicate them.

 

[The-Wolf]

Individual fish stay apart from others. Breathing is normal.
They may refuse food. They may have "cloudy" or grey areas
on the skin. There are no other physical signs.

1) Fish may be suffering from a parasite problem.

2) There could be an internal bacterial infection

3) Early stage of systemic bacterial infection. Isolate and observe

4) Poor water conditions, test core parameters.

we had some neons at work that looked like the one in the pic, a course
of Acriflavin by NTlabs cured it. So my guess is a bacterial problem.
Treat with the strongest anti-bacterial you have to hand.

 

[WILDER]

I would issolate the sick fish immediately as also it looks like ntd as well, as my neons started with bleached out patches like that.

http/freshaquarium.about.com/cs/disease/p/neondisease.htm