dianos attacking each other tails

[cowchip]

can some one please explain what i need to do, my zebra dianos are nipping each other tails.............one is completly gone

 

[WILDER]

Please post test results in ammonia,nitrite,nitrate,and ph, what size tank, which fish and how many.

 

[Lynz781]

Thats Danios for you. Is your tank new? They could be trying to establish a pecking order. Sounds like they wan't to kill eachother though. How many do you have?

 

[cowchip]

school of six zebra dianos.. weekly 10% water change. in 55 gal tank ....apears to be one male and five females .....one female with tail nipped completly off...others are chasing each other an nipping at tails....have had dianos for three weeks and thay have never schooled......tank includes 2 male gourmias, 2 cory cats, 2 plecos, 1 male beta and 1 female beta....ph is 7.0...water temp 78 degrees..

 

[Matchu]

I've got a new tank (31 G) with 5 danios cycling, and they arent really schooling, and the bigger ones chase the smaller ones round a lot, I guess its normal?

 

[Lynz781]

I've got a new tank (31 G) with 5 danios cycling, and they arent really schooling, and the bigger ones chase the smaller ones round a lot, I guess its normal?

Yes they chase eachother all the time. I was told they shoal when they are frightened. And when they spread all over the tank they feel safe.

 

[Lynz781]

school of six zebra dianos.. weekly 10% water change. in 55 gal tank ....apears to be one male and five females .....one female with tail nipped completly off...others are chasing each other an nipping at tails....have had dianos for three weeks and thay have never schooled......tank includes 2 male gourmias, 2 cory cats, 2 plecos, 1 male beta and 1 female beta....ph is 7.0...water temp 78 degrees..

Well you will have to watch her tail does not become infected. Melafix may help it.

 

[SMSBrunetteGirl]

Hold on hold on!You got a female AND male betta in there??

 

[The-Wolf]

when danios are introdued to a new enviroment they will go through a pecking order, to find the alpha fish. This is perfectly normal behaviour and nothing to worry about.
you may also find that if you re-arrange the tank decor in the future they will do this again, still nothing to worry about.

If the female starts chasing the males she is looking for the best male to start breeding, again it is nothing to worry about.

now if a male starts swimming at any fish at full speed and aiming for their midsection, this is aggression an he is aiming to kill.
the only reasons this would happen are...
1: lack of space(too small a tank, overcrowding etc)
2: lack of numbers (less than 5 danios)

HTH

 

[The_Gilly]

you might also want to either split the male and female betta up or add further females.

Some say don't have male and female bettas together but this all depends on the bettas.

 

[keane]

Hi,

Don't really know much about danios as I have never kept them, however, having noted your stock of fish you may want to consider the following: -

1. removing one of the male gourami and replacing with two females. Two male gouramis will also fight with each other.

2. If the plecos you have are common plecos then I would remove one or, better still, both of them. They will each grow to between 12" - 18" and a 55 gallon is too small, especially with all the other fish you have in already. If they are not commons then you may be ok but do some research on the species you have. If they grow to anywhere around 12" then you should definitely get rid of at least one.

3. adding another 3 - 4 cories. Cories love each others company and should preferably kept in groups of 5 or more.

If you carry through with the above you will also have room for some additional, smaller fish. You may wish to add some more danios and hope that this reduces the aggression they are currently showing.

I am sorry this doesn't answer your initial question but I hope this helps with the success of your tank and fish.

steve B)