ive got a 38gal with a growing mts population. im wondering if, once the population gets established, would i be able to get a dwarf puffer without the puffer eating all the snails? i would want the puffer to eat some snails but not all of them, to that there are always snails in the tank for him to eat. that way, i wouldnt have to feed him snails. is this possible, or would the puffer just eat all the snails?