Oh No, Its Back!

[BettaDreams1227]

I had a sickness in my females bettas tank that wiped out 8 of my girls, and nothing I did stopped it until I seperated the remaining girls and completely nuked the tank, Its been 3 weeks and everyone was doing fine then I found one of my girls dead this morning from what looks like the same thing! I don't know what to do!!!

 

[CatLover]

Sorry to hear of your trouble Can you describe what the mystery illness does to the fish (other than killing them), or do you have any pics? Do they develop any odd physical traits? Do they look totally fine when they die?
If they look fine, but you are still finding them dead, then there could be something wrong with your water (some towns/cities just havae really weird and bad water) or you could be encountering an internal parasite.
Hope you don't have anymore deaths!