Hi all, i have a 6x2x2 with a 9" silver and a 4/5" silver and a lone geo lol...now there is no aggression between the 2...but the smaller one cowers in the courner but ventures out some times to say hi and to feed but one look from the bigger one and he goes back to hidding, now my question is my not so lfs has some nice 7-9" silvers in...will adding another one bring the smaller one out...or will the two biger ones beat the small one then fight between each other?? i dont want to spend 50 pounds on a new arow then the $h*t to his the fan....the only other fish i plan to add is a meddium size catfish, maybe a pimolodus blochii or a dwarf giraffe cat and then a pair (breeding or just 2 individuals) red head severums and maybe another geo...but more focusing on the arows (7x30x30 is in the making....well looking to buy lol) tank has an FX5 and a 200w and 150w heater with 2 standard 5ft aquarium bulbs, sand bottom and minimal decore....2 bits of slate and 8 plants....thanks in advance