Help!

[deannaerin]

So I wake up to find my biggest Danio barely swimming and sulking in the corner and my smallest Danio picking on the other one too! He would chase the other one around and around the tank, and then stop and try to chase that one, but he's injured that one. All of my tetras are fine and schooling in corners while all of this is going on. I mean my smallest danio was being ruthless, I didn't know what to do so I took him out and isolated him in a 1 gal (it's all I have for a isolation tank) I thought about isolating the biggest Danio because he was really injured, but the smallest danio would just injure the other one. No one is bothering him, they're all pretty shocked from what just happened I'm assuming. I'm at a loss for what to do here. Obviously I added the most Melafix possible to the water, but this is my first time dealing with anything of the sort.

For reference I have a 10 gallon containing 3 long-finned danios, 3 phantom tetras, and 1 albino cory cat

My cory cat hasn't even noticed a difference. The fish don't really care about him at all, so he's fine. I'm just not sure what to do.

 

[Davo86]

Hi, i'm afriad that the tank is really too small for danios and they (and the phantoms) are in too small a shoal, When kept in small shoals battles for dominance are more severe and so aggression is increased.

 

[deannaerin]

Hi, i'm afriad that the tank is really too small for danios and they (and the phantoms) are in too small a shoal, When kept in small shoals battles for dominance are more severe and so aggression is increased.

Yeah, I realized I messed up with my first tank, but I really do love the fish I have and I want to do anything I can to make it better for them while I do have them. I have learned my lesson. But the thing is, I'm asking what do I do with the situation at hand now?

 

[tenohfive]

Take the danio's back or buy a bigger tank (and up their numbers to 6.)

Theres no middle ground, thats the only solution.

 

[deannaerin]

Take the danio's back or buy a bigger tank (and up their numbers to 6.)

Theres no middle ground, thats the only solution.

I can't take them back. I bought them over 4 months ago at Petsmart. I'm not asking whether I should return them. I get that I made a stupid mistake and I didn't do enough homework. Not only that but every LFS I've been to gives me different information. It's hard to know who to believe.

I'm asking what I should do given then situation I have WITH my fish that I HAVE now. There is no taking them back? How could you return fish? I mean really, do you keep your receipt? I don't mean to be rude, it just doesn't make any sense.

I got my 3 phantom tetras at a LFS that told me they'd be fine with my danios and even told me I could get 3 more rasboras if I wanted to later on. The woman that sold me the cory cat told me one was all I needed for a 10 gallon. Ugh!

It's the most stressful thing ever and I really wish I never would have started with a 10 gallon. But it's too late now and I'm not going to let the fish I already have down because of my stupidity.

So, if anyone has any suggestions as to how I'd go about doing that, I'd greatly appreciate it.