Harlequin Rasboras Dieing!

[Siamesefish]

I Purchased 5 of these tiny guy 2 days ago and put them in with my fighter fish. There was no problems at all.
However yesterdat one died and i dont have a clue how. And today another has died. Todays one looks as if it tail was partially bitten off.


I have moved them to my other tank with my Angelfish but im not sure whats happening.

I cant help but notice a strange smell coming from my fighters tank, awfully like a gas smell. Any ideas how to sort it or what it is?

When i first noticed it yesterday i immediatly done a 50% water change, water was somewhat still murky and now still smells!

Please Help before the rest of my little fellows die!

UPDATE!

After moving the rasboras almost 4 minutes ago the angelfish seems to be attacking them!!!


I have nowwhere to put them now!

and they are staying literally at the top of the water, they werent doing this at the fish shop!

 

[seanc]

quite possible the betta attacked them.. or nibbled it after it dier.. water stats? ammonia nitirite nitrate... do you get these from a local store with same water supply etc?

The smell sounds like ammonia; probably due to one rotting in the tank..worth doing another water change (30%?).
Rasboras are small enough to be angelfish food.. better in with the betta. take em back to the lfs if you have nowhere else? (not even a clean bucket you can put somewhere warm ?)

 

[Siamesefish]

I have them just put them back into the bettas tank, attack one violently , rasbora survived luckily. Took them out and put them into a bowl.


I will have to take them back to a fish shop tomorrow but i dont think they will survive the night

 

[seanc]

Hopefully they will.. harlequins can be quite hardy. try adding some melafix if the attacked one is hurt at all, keep the bowl at a steady temp, and dont feed them so the water doesnt deteriorate in quality.. they should be OK. Good luck!

 

[Siamesefish]

Cheers Dude! Hopefully they will last so i can take them back!

 

[diademhill]

The tank isn't cycled.
Please read the links you've been given in previous threads.