Dwarf neon rainbow fish dead.

[Impulse09]

I noticed last night that he was breathing heavy and swimming at the top. I checked my water and amm=0, nitrite 0 and nitrate around 20. He was dead this morning I did a 35% partial water change on Sunday. I do not use carbon in my filter. I read it really isn't needed. Could this be a cause. My tank is a 29 gallon pretty stocked. Also this morning I saw a neon tetra almost dead, then I couldn't find him. This is weird.

 

[Impulse09]

Anyone?

 

[Desastre]

Poor stock or just it's time if your readings are ok which they seem to be.

 

[jlk]

Your water doesnt seem to be an issue. Whether you use carbon or not, this isnt a factor in your fish death. I have to agree that it is most likely poor stock. Keep us posted if you have any more issues!

 

[Impulse09]

He was doing great for a while. I have 2 well now 1 male and 2 female neon rainbow fish. I would of just said ok if just the rainbow fish died, but also my neon tetra. I find it weird.

 

[Impulse09]

Here he is. My other male last night was trying to finish him off. He was fighting with him.

 

[TheCrazyFishLady]

They can get aggressive on sick fish. I had an Australian rainbow who developed lock jaw and before I got to him, they did...

 

[zach_1_6]

same thing happened to me with on of my dwarf neons, my water was perfect, i think it is also just poor stock.

 

[Impulse09]

The neon came back to life, the rainbowfish was so cool looking I feel bas I couldn't help him

 

[Impulse09]

Neon tetra that is..

 

[Koikid88]

How are rainbow fish temperament when stocked properly? Are they good community fish?

Was looking into getting a small school of Bosemani for the 90g.
But there's kribs, a juvie yellow lab, red eye and glow light tetras, and some other bottom dwellers.

 

[Impulse09]

Mine di not bother any other fish. They are a good community fish, my two males seemed like they were competing with each other. The bigger male got sick and the smaller one saw that and kept bothering him. I dont think they are really aggressive. The boesemi will look good in that size tank

 

[Impulse09]

After about a 40% water change a neon tetra and dwarf neon rain ow fish dead. Could it be the amount of water I am changing affecting them?

 

[Impulse09]

The only thing I can think of is the ph of my tap is 6.4 and the ph of my tank is about 7.2

 

[jlk]

The only thing I can think of is the ph of my tap is 6.4 and the ph of my tank is about 7.2

Thats a decent difference. You can try doing more fequent, smaller changes (20-25% 2-3x wk) to lessen the ph swing but still keep a healthy tank.