We got 3 Angels this past Sunday (a silver, a marble and a koi). Monday evening the silver one died (odd from the start), and just today the marble died (seemed normal until now). Those two never really ate much if anything at all, but the koi seems to be doing okay. He's bigger than the other two (50 cent piece, the others were quarter sized), but is pretty mellow. The water parameters are fine (6.8pH, 0 ammonia, 0 nitrite and 5 nitrate), and the other fish are fine. We have 3 Silver Dollars, 2 Gouramis (gold and opaline), and a Rainbow Shark. We haven't seen any signs of aggression towards the new angels.
After doing a lot of reading today, it seems it would almost have to be bullying from either the bigger Angel or the Gouramis, but again, no signs of aggression that we've seen, nor any damage on the dead ones.
Any thoughts?? Thanks in advance.
EDIT: The tank is a 55, and we had thought the Gouramis were the culprits earlier, but now we're not sure.
After doing a lot of reading today, it seems it would almost have to be bullying from either the bigger Angel or the Gouramis, but again, no signs of aggression that we've seen, nor any damage on the dead ones.
Any thoughts?? Thanks in advance.
EDIT: The tank is a 55, and we had thought the Gouramis were the culprits earlier, but now we're not sure.