I would say in a 25 say you could do 2 or 3 yellow labs.
My plans are to pair a male and female to breed them. At that point, they will have a tank completely to themselves. I really do not want more than 2 of them. The Kenyi's were an impulse buy as I wasnt sure what they were and of course, none at walmart knows anything I have no problem giving them away or swapping them for something different. I wouldnt keep them and make them live in a tank too small for them. I will keep them until they are a bit more mature tho.