I have read that it really depends on the betta, but according to Petco's compatibility sheet (if that means anything, coming from them - it's attached), they are "generally compatible."
Well, I brought three zebra danios home Friday night and I only have one left.
One of them was bigger than the others and bullied them around. I think he thought he could bully my betta, but quickly found out otherwise. After a short while, I noticed that one of his fins was ripped. I wish I would have taken him out right away, but I thought he could easily get away from my betta. Apparently, that wasn't the case. I found him floating around, but still alive. By the time I got a container ready to put him in, he had gotten sucked up against the filter intake and was dead.
I guess the attachment is too big, but you can see the sheet here:
My betta had been harassing the other two, but they easily got out of his way before he could hurt them. Apparently, he must have snuck up on one of the others, because I came home tonight and another one of them was dead. This one looked like it had been eaten, as there was a big hole in his stomach.
I feel horrible about "sacrificing" two poor little fish to my betta, but I have taken the last one out and put him in a container by himself.
I would like to have some other fish in my 10-gallon, but I don't really want to keep "feeding them" to my betta.
Does anyone have any suggestions on what fish to get? I was going to get an ADF, but a guy at Petco told me they aren't good for new tanks. I'm about to head to The Fish Store. Hopefully, they will be knowledgeable and be able to recommend something.
If you have any suggestions, please reply ASAP, as I'll get an email on my phone when I get a reply.
Thanks for your help!