Listing Danio

[eydon00]

Hi,
I originally posted in the New To Fish Keeping Forum, but was advised to repost here....

I recently set up my first tank (100L), and started off with 4 Platys to cycle the tank. I lost one to ich, but the other three are thriving.

Since then I've added (gradually) 4 Zebra Danios (2 long-finned and 2 short-finned), 4 Yamato Shrimps, a pair of Neon Blue Dwarf Gouramis and half a dozen Neon Tetras.

All the fish were looking very happy and were getting along nicely, but the other evening I noticed that one of the long-finned Zebra Danios was listing at around 45 degrees as it was swimming, and didn't appear to be eating. I also noticed that the other Danios and the Platys were all having a go at it whenever they saw it.

I assumed he'd be dead by morning, but a week later he's still there, and as far as I can tell he doesn't appear to have got any worse - although I still haven't seen him eat anything.

Any ideas?

 

[WILDER]

Does he look bloated or thin.
Does he look pale.
Sounds like he can't maintain his balance in the water.
Sounds like swim bladder.
What do you feed your fish?

 

[JellyPi3]

water tests? ammonia, nitrate, nitrite, etc?

 

[eydon00]

Does he look bloated or thin.
Does he look pale.
Sounds like he can't maintain his balance in the water.
Sounds like swim bladder.
What do you feed your fish?

He looks thin (compared to the other Danios) but colour is normal. Used to feed them on flake, but switched to a new food a few weeks back - Tetra Prima Complete.

 

[WILDER]

Is he thin through not eating.
Does his spine bend abit.

 

[eydon00]

Is he thin through not eating.

Quite probably

Does his spine bend abit.

Not that I can tell

 

[WILDER]

I would treat him for swim bladder.
Peas and if you can issolate him bacterial med.
But to be honest he dosn't sound good.

Cook peas for a few minutes, let cool down, pop out of shell, mush between fingers into small bits, add to the tank.