If you cant handle anything maybe around 500 gallons or more then maybe it can go for a short time lenght of the time to stay in that tank or pond.Most suggest for these huge monster more than 600 gallons...some say they dont need much space since they mostly stay in a spot most of the time durin the day...but hey the thing is that THESE gets HUGE!! lol around 4-5' may not get 5' but its a possiblities from all the other pics and info in a thread saying with proof of large ones in Europe somewhere their in a large aquarium.For me im going somewhere around 3,000 gallons to 6,000 gallons in range...making it all amazonian...with a pima,rtc,rtc x tsn,umbee,pleco and some other odd balls like silver arowana,african arowana,and other many peacock basses...but the way im making my tank is going with info that John gave to me...i had many different dimensions to try out but i may just go with a 26'x18'x8'