Hi all, I have a question about why and how my zebra danios have been disappearing. I had 3 zebra danios and a betta in a 3 gallon tank and I felt that they needed more friends so I bought two more danios, then one by one they started disappearing over night. I have no trace of the bodies and the surviving don't look like they had bigger bellies. Now only two danios and the betta remain.
I also have three more in a 6.6 gallon with other community fish, and they get along just great.
Thanks for all advice in advance.