I bought both my male and female beta from WalMart, even though I know they're bad, very bad about the care of their fish. But they both looked healthy. I've had them for about 3 months now. They've mated, and unfortunetly, I didn't know what the bubbles were until too late, didn't take her out, and lost the fry. They're at it again though, lol. She's got stripes and they're flirting. I think maybe it'll be tonight by the looks of things. (Except there are no bubbles, can they mate and not have bubbles?)
Your question deserves more attention than we can give it on this thread about Walmart.