Problem With Chromis

niloc16 · #1 10-10-2007, 02:35 AM

what size tank do you have them in. i've heard of a school picking off a couple until they are at a size where they feel comfortable. maybe 4 is too many for your size tank? just a guess

super7 · #2 10-10-2007, 02:44 AM

My tank is a 65 gallon. The store where I work at has the same size tank with way more fish so I thought maybe too few.
No clue
Thanks Super7

justinl · #3 10-10-2007, 01:30 PM

a 65 is too small to harbour any more than one chromis imo. theyll pick each other off until there is eventually only one left.

a fish store is a much different situation for any fish situation. in an lfs the tanks are so crowded that fish have so much competition that none of them can even establish any kind of territory. there is also the fact that oftentimes the fish arent left in the tank long enough to show any aggressive behaviour.

Der_Iron_Chef · #4 10-10-2007, 02:26 PM

I have two chromis in a 55G, but they do square off semi-regularly. I used to have 4. I'm not sure what you *can* do.

seashells · #5 10-10-2007, 03:10 PM

I had 4 in a 75...Three stuck together but the 4th was left out, an outcast of sorts. Anyway took 2 out & the all fot along.

michika · #6 10-10-2007, 03:15 PM

I used to have like 10 in my 230, they schooled for about a year and then suddenly they turned in on themselves and started picking each other off. I had 4 when the 230g came down.

whosinpower · #7 10-10-2007, 05:28 PM

I was planning on having 4 blue chromis in my 90 gallon reeftank. Tank is still (will it ever end?) cycling - so I was researching and reading up on livestock - fishes and corals.

Now, with this information...I am rethinking my plan......hmmmmm.....

ed99 · #8 10-10-2007, 03:14 PM

I had the same problem- started with 7 chromis and ended up with 4 in a 92 gal. It seems if they are not threatened they will drop the schooling behaviour and become more territorial with each other. I have heard that adding a small damsel can add enough peskiness to the tank that the chromis will stay in a school but never tried that myself. There was a thread on this subject a little while ago, seems few people have success unless they have a large tank.