why are blue/green chromis so sensitive??

[TRDfan]

Do you guys/girls have a problem keeping small schools of blue/green chromis?? Ive had 3 different 3-4 fish schools of chromis and each one of them die on me. This is over a 6 month period or so. I have 4 different types of fish (clown, royal gramma, purple firefish, cardinal) in the tank and they are healthy as can be. Just the chromis keep deing on me in a period of a month or so after i get them (1 every week or so). A friend of mine went from 10 fish school down to 2 also.

So why are chromis so sensitive?? Is this normal??

 

[Jake337]

Ive had my 3 chromis for about 7 months now. Chromis are easy and hardy fish so I don't think it's them.

 

[54seaweed]

it depends on the suppliers source I had 4 but down to 1 these were tank raised
the wild caught are a bit hardier than tank raised (So I was told)
I bought 3 wild caught and there doing great their also a little darker greenish blue

 

[Beengirl]

I've had the same 3 for months without any problems.