assams are smaller than bleheri, assams were originally thought to max at around 4" but mine and others maxed out at around 6", and the bleheri max's at around 8" you will have to either keep a single fish, or a group of about 6. if you could get a bonded pair of assams or bleheri they would probably be ok in your tank but it wouldn't be big enough for a group, well, not bleheri anyway. you would probably get away with a group of assams until you got a pair or as simonas said, orientalis are even smaller and can be very good looking fish. the ones on sale on here are ornatipinnis, which can get bigger then the mentioned ones here.