One of the things you have to worry about, (this is from personal experience), is how the tank is set up. One of the problems with getting fish that are small and thin is that your filter can't be a strong one. I've had small aros get either sucked up the intake tube or stuck to it. I've also had small aros stuck against the slotted cover that goes on the intake tube. I cried every time that happened. The Doctor.
