I bought four fish for my friend's birthday and found out he doesn't even have an aquarium anymore. He said he'd take them but I felt bad and actually like them so I just decided to keep and now I'm left with these fish I knew nothing about. They've been in a one gallon tank since friday.Bought from Walmart two tiger barbs and two fish that I can't seem to find the name. The lable at the store said they grow to 2" and are hardy, but may nip at long fins. I'm also buying a bigger 10 gallon tank cos it's the most I can afford and I was wondering if I should leave them or buy three more tiger barb and one more of these fish? They've all been getting along fine and they stay together.