Chromis Acting Weird

[demasonisrule]

I have 6 blue/green chromis in my tank...All of them were eating well and acting totally normal yesterday, but today one of them is in the corner of the tank not moving a whole lot. He looks totally normal, other than a tiny little cut in his dorsal fin, though I doubt that has anything to do with it. He is apparently trying to eat, but is failing...it seems as though he lost all of his coordination. He'll bite at it, but miss every time. He is also very aggressive to all the other chromis that come near him. I'll get a pic if you want it...the water params are:
NO3-0
calc-425
pH-8.2
alk-10
haven't tested for mag lately...

 

[nkd5024]

I would check the rest of your stats. ammonia, salinity, nitrite, ect.

Maybe the other 6 Chromis are picking on him? Is he smaller then the rest of the fish?
Does he actually miss the food, or does he just spit it out? Iv'e never heard of a fish missing food that he's trying to eat, weird.
Post a picture when you get a chance. Other than that I would just recommend keeping a close eye on him.

Sorry this didn't help much

Nick

 

[seffieuk]

I'm afraid chromis are well known for picking on the weakest of the group until they die they have to be fed several times a day (which most of us dont want to do) to keep this aggression at bay

Seffie x

 

[demasonisrule]

I would check the rest of your stats. ammonia, salinity, nitrite, ect.

Maybe the other 6 Chromis are picking on him? Is he smaller then the rest of the fish?
Does he actually miss the food, or does he just spit it out? Iv'e never heard of a fish missing food that he's trying to eat, weird.
Post a picture when you get a chance. Other than that I would just recommend keeping a close eye on him.

Sorry this didn't help much

Nick

SG is 1.025, I haven't tested for ammonia or nitrite because I figure if I have either of those my acros and other fish would be displeased. At first I thought that he may be getting picked on, but he's actually the biggest and picks on the others when they come to 'his' corner...surprisingly similar to his clown cousins...

I'm afraid chromis are well known for picking on the weakest of the group until they die they have to be fed several times a day (which most of us dont want to do) to keep this aggression at bay

Seffie x

As said, he's actually doing the picking...I usually feed about 2x a day.

Sort of an update...He's gotten much much less aggressive to the others, and I can tell he wants to follow them, and he does start to, but once he's a little way's away he turns around and heads back. He can catch his food now as well. Today when I was cleaning the glass, I sort of freaked him out a bit, and he did go with the group for a minute or so, but then when I was done he went right back. I'm starting to think that he's just stupid...

 

[ben1987]

ime to keep a group of chromis long term, a larger number than 4 is required. this way agrression is spread and one runt doesnt take it all!

also feed little and often 4-5 times if possible, keep them constantly nibbeling something

 

[Eversurf]

I started with 6 Chromis and now I have one big one. They picked on the weakest of the group until there was 1 left.

I am in a 75G tank.

There is not much you can do.