Fish shouldn't even be sold with tanks, they have to cycle first I saw a couple buy 2 irredecent sharks with a small 12 gallon bow front. The sharks were only 3 inches but they wouldn't grow anyway because they would just die a couple hours later in an uncycled tank I don't buy fish from walmart, I think of it as a food store. No offence to anyone here but it shouldn't kill----I mean sell fish. Hopefully, walmartfish, you maintain the tanks well and keep the fish alive while they are at the storerollntider said:I wished they would make people have a liscene to buy large fish like pacus so they wont be released into the wild. Pacus get huge and i bet most of them are sold to people with 10 and 20 gallon tanks