hey puffa mate.. what is your tank size? or is like a pond.. cos you said you had a sturgeon.. think in terms of that.. a tsn is gonna grown def larger than a Aro.. and if you had tank mates they could end up as dinner.. i've always(and still looking) wanted a tsn.. but having a rtc is quite a task.. so the tsn dream is slowly disintegrating.. play to your strengths.. i've never liked asian aros.. but in a situation like this i think that'd be the right choice..
