Eggheadfish
Aquarium Advice Addict
Hi...I don't have much to contribute but wish you the best. I had a near identical situation last month. I added four albino corys to my tank and two months later I had lost 11 fish. I couldn't tell what it was because some corys had paled, some had wounds or hemmorhaging, lost barbels and their mouth degraded, and some had no symptoms at all. It also wiped out my swordtails. I hope you can keep the remaining fish. I kept doing water changes and lots of cleaning and eventually fish stopped dying but I have no clue what happened. There's not much around where I am in the way of meds.