fish aggression HELP!
I'm not sure whats going on in my tank. I came home yesterday from spending fathers day with my dad, and one of my fish have died. I removed him from the tank and when I woke up this morning my one of my fish is chasing the others around the tank, nipping on fins and just running around the tank as fast as he can. What is going on? what can I do?
Hello, unprejudice, and welcome to TFK!!!
First off, lets try and get some informaiton from you to better try and narrow down the problem. If you could answer the following questions, it would be able to help us out better:
Size of tank?
fish kept and how many of each species?
water changing schedule?
get back to us with the specifics and we can all go from there!
I had 6 red tetra, and 3 skirt tetra, I just cycled the tank, its about 3 weeks running adding 3 fish per week. One of the red tetra died, there in a 55 gal tank, I do a 10-25% water once a week...
and thanks for the welcome.
I'm going to guess that your "red tetra" is the Serpae Tetra and these fish are notorious bad guys. Read up on them in our profile, you can go there by clicking on the shaded fish name in posts or from the blue abar at the top, second from left is "Tropical Fish Profiles." You will find info on how to handle these fish.
Their behaviour causes stress to other fish and this may have been the cause for your dead fish. Plus the stress from the new tank, ammonia and nitrite levels can take their toll and while these are fairly hardy fish they are still sensitive to toxins.
"Shoaling" fish need to be in groups whatever the species, or they frequently become even worse.
If they are in fact the Serape Tetra I had the same problem. I started with a school of 6 and they were torturing some of my other fish, I then pumped them up to 12, I lost two, but the 10 of them are much more timid that they were as a group of 6
They are infact Serpae Tetra, They seem to have calmed down a bit this afternoon after feeding time. I believe according to the pictures in the fish profiles the other fish I have in the tank right now is the black phantom tetra. They seem to be holding there on in some kinda defencive setting, One on the left, one in the middle, and one on the right. There keeping to themselfs and not bothering anyone else or is any of the Serpaes messing with them. The Serpae where attacking themselfs. Like I said I had 6 of them being I already heard they should be in groups of 6 or more, But I think the most I can have in my size tank would be about 40 fish total. I ran out of test kits and cant test my water like I need to with it being a new tank. Thanks for the help, I'll keep my eyes on it and try and do better with the look. Thanks again.
Welcome to TFK!
I think that adding more serpaes might help to alleviate the problem and should be fine since you've got a fairly large tank. You might want to wait a little while, though, since this is a newly set up tank and you wouldn't want to overload the biological filter. More of the black phantom tetras would be a good idea, too, as they're also a shoaling fish that would benefit from having more of them in the tank (they'd probably also feel a lot more secure in a larger group with those bully serpaes around, even if the serpaes haven't attacked them directly).
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