Argh! Green Barbs Keep Dying!

Amunet

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We recently got 2 green barbs to go with the 2 regular tiger barbs.
The tiger barbs are in the quarantine tank, and that's right where the greens went as well.
Everything was fine until yesterday.

One of the greens started to float at the top of the tank. Kept going belly up and couldn't keep itself upright. I scooped it out and put it into clean dechlorinated water, but it died shortly after.
So off we went back to the petstore to return it. We got our money back and went to another to try out their fish since the ones we got from it before have all been doing well.

We got a single green barb to replace the dead one. Brought it home, floated it, stuck it in the tank, and a few hours later... it was floating at the top belly up. It was struggling to live but it eventually died.
BUT that's not the end of it... while this one was struggling to live, the other green barb started to do the whole floating at the top thing as well!
So I took it out, put it into some clean water... but it kept getting worse. So not knowing what to do, I eventually just put it back into the quarantine tank.
Things weren't looking very good, but this one seems to have started to get some of it's str back. It's not floating any longer and is swimming a bit stronger.. but still looks VERY weak like it could get worse in a flash.

What on earth is going on? The 2 regular tiger barbs are just fine. They think they own the tank and pcik on the new addition a little bit at first to show them who is boss, but after a short time of that, they stop. The ones that have died have no nipped fins, no wounds, nothing.

No the tank isn't cycled, I do daily 50% water changes to the tank to keep ammonia down. I did a test on the water and the ammonia is at about 0.25-0.50. Would it hurt the fish any if I put some Ammolock kind of stuff right into the tank? Or should I just put that stuff in the replacement water during water changes.
Quarantine tank is only 3-4 gallons, but figured since it's only a temp tank it would be ok to use. It's heated (82F).. and filtered and has an airstone.

We've used this tank before for our guppies and they're all perfectly healthy. Are barbs just not as hardy? The ones we've been gettng have been the smallest of the bunch (largest we got was only about an inch long) b/c the tigers we have are very tiny and we wanted them to kinda grow big with eachother in the main tank.... if that makes any sense lol.

And blahblahblah.... enough with my essay.... any idea what could be going wrong? I haven't done anything different. No air fresheners or anything of the sort has been sprayed near the aquarium... nada.
 
Theres going to be no ammonia in the water from where they came from and then theyve been introduced into your tank that has ammonia in. That's going to result in dead fish. Wait until your bacteria colony is big enough so that there is no ammonia, no nitrite and a bit of nitrate. Then get a few fish, say 3. Wait a few weeks and then get a few more fish.
 
I actually have no idea what the shop's water readings are. I guess if we're going to get anymore (bf is a bit frustrated at this point).... I'm gonna have to acclimate them alot longer.
I'm also gonna start using some Amquel I have on the tank as well to keep the harmful ammonia under control.
 
Something is seriously wrong with our quarantine tank... One of the regular tiger barbs started to act a bit sluggish. Not like is usually did.
So I started the tank on tetracycline just in case.. but few hours later and I found the poor little guy stuck in the filter intake tube dead.

I don't know what would be causing them to die like this. Maybe one of the other barbs we had gotten brought something bad into the tank?
I've been keeping an eye on the ammonia and been making sure that it doesn't reach over 0.25.. AND I'm using Amquel which is supposed to ge rid of the ammonia.. or change it to the nontoxic form or whatever.
But poor fish are still dying... damnit it's FRUSTRATING.

Now I want to take the other barb out afraid it will also get sick, but don't have anywhere to put it. Can't put it into the big tank, b/c if it did catch something I don't want our other fish to get infected... and even if it's not sick.. I don't want it to turn into a little hellion like before and start nipping away at the poor guppies.
BLEH I say...... BLEH :-(
 
Even a reading of .25 ammonia would be enough to by causing this. With the combination of stress from being moving, and having ammonia in the tank, I believe this is the problem. Not sure why the Amquel isn't helping more though. Are you still doing the partial water changes?

I wouldn't buy anymore fish until the Q-tank is finished cycling.

Wait, is this other tank fully cycled? If it is, you can just add some filter media from that to that QT to jump start the bacteria. It won't instantly help, but I image within a day you should notice a difference.
 
Yeah I've still kept up the water changes.... I really do think that first green barb we got brought something bad with it. Cause now the other barb is dead as well. SIGH..
I'm cleaning it out in a little bit... gonna throw away all the gravel and stick some of this left over red gravel in it.
Think I'm gonna throw out the filter and get a new one, whenever... then I'll start the tank fishless.
 

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