i have twenty or so small silver arowana for sale perfered pick up but will consider shipping fo right price located in central iowa email @ rott6180@msn.com 
no my name is Adam, These babies are 3", and you need a large tank for a full grown arowana but could probally keep one for around a year in a 55 otherwise you need a huge tank but i will take big aros back if you cant keep them i have indoor ponds for them but mainly for their health you want a tank as wide as they are long and three times as long as the fish my 20" silver has outgrown my all glass 110 gallon if that says anything and hes (I thnink that its a he) only 1.5 years old