chromis keep disappearing (1 Viewer)

[julio]

ive had about 20 chromis in the last year and they mysteriously disappear one at a time. they look healthy and all of a sudden one will be gone. i have several fish and none disappear like these. any ideas

 

[deepsea43]

I have not had it happen to me but I have heard that they will kill each other until there is a small school. Other than that I am clueless.

 

[AquaNerd]

they are fairly aggressive toward each other. they just kill each other off a little at a time.

i started with 5 or 6 and down to my last two.

 

[julio]

what is considered a small school? i try to keep 6 but im down to 3.

 

[deepsea43]

that is pretty much it. I have seen it done a 6 but normally it is less or they kill each other till there is 3 or less left.

 

[mike13oy]

The male will kill each other. You can only have one male in your tank. you can tell the different between a male and female. when your actincs light come on, you can see about four deep blue strips on the body (running from head to tail) of a male.
i started out with 30 and still have 20 left.

 

[julio]

lots of useful information. i really like the chromis so im going to buy a bunch more and hope the odds are in my favor that the females out number the males so when the killing is over i still have a few females and one male.

 

[BostonJosh]

I had an open top and they would jump out and die