I have a cycled 55 gal
with 7 zebra danios and 2(3 as of yesterday) tiger barbs and 2 albino tiger barbs.
Fri. evening I added 2 male tigers and 1 male 1 female albinos to the tank to accompany the lone female tiger. I did this because I think she's lonely and not very active all by herself, and also in hope to reduce her aggressiveness for future tank mates. She and one of the albino are about 1.5", the new tiger barbs and the other albino are about 1".
All five barbs shoaled for a brief moment before the fish turned aggressive on her new tank mates. She literally chased around every barb in sight relentlessly and eventually fin nipping started.
1 new male tiger had died yesterday morning, 36 hours into the tank. I think he died of stress caused by the bully attacks although there's no visible sign of sickness other than nipped fins. This morning I discovered the other new male tiger is swimming and breathing hard. I fear he is going to die soon.
With no additional tank on hand, what options do I have? I tried to overfeed them a little in desperation to hope for some behavioral changes. I doubt my LFS
would take her back. Anything else can I try?