They don't look like vatf to me, I can make out the protruding lower slanted jaw and the extra slender body silver sheen. Probably fatf, if they are then you lucked out as they are the smallest growing ATF but you'd still need a wide foot print ultimately. I have had my ATF in a 2ft wide tank for just about two years and they are maxed out in size until I upgrade. If you can do a 6feet by 4feet, it may be alright for life actually. But that will take up much more space in your living room. A 2 feet wide x 6ft long can work for about 2-3 years for you.