I tried several years ago to set up a pony tank and I say tried becuase it did not last long. I am thinking about aing a new tank and doing a pony tank, looking for tips or advice, this will be a complete new set up so size, filtration, etc. will be pony minded from the ground up. I am thinking about 2 or 3 pairs , H kuda, h fuscus and a pair of h erectus.