Can 12 Chromis be introduced at the same time into a 190g?

[Dearth]

Originally Posted by Taipan

Short Answer: Yes. Bioload should be fine. They also shouldn't bother the existing tank mates....in theory. They look very cool together schooling and shoaling.

Long Answer: Mentally prepare yourself for disappearing chromis. Whether by aggression amongst themselves, injury, or disease. Long term; from your initial 12, you'll lose approx 4-6. It's what they do. The good news is....they are relatively affordable that you can replace mysteriously disappearing ones if necessary.

+1

[mark]

tried a school of 5 or 6 in in a 145g. after a awhile down to one remaining though its been with me 5+ years. btw they never did really school

[reefwithareefer]

I bought 5 from a reputable LFS and within a week all were gone but one, then 3 days later the last one died. Everything else in the tank was fine... I did buy two other small fish with them and they are doing great.

[gobytron]

Originally Posted by reefwithareefer

I bought 5 from a reputable LFS and within a week all were gone but one, then 3 days later the last one died. Everything else in the tank was fine... I did buy two other small fish with them and they are doing great.

probably found a reflection and offed himself.

[reefwithareefer]

Originally Posted by gobytron

probably found a reflection and offed himself.

???

[gobytron]

meaning one became dominant, then killed the others, and then turned on himself.

[reefwithareefer]

Originally Posted by gobytron

meaning one became dominant, then killed the others, and then turned on himself.

So I know that there is a strong chance that one can become dominant and kill off others. But are you joking when saying it can turn on himself because of a reflection? Does this happen to many other species as well?