lol, not being funny mate just informative. you didnt know what it was now you suddenly want to try to house one... huh? if so just go straight for a 1500 gallon pond and be safe for a few years.
remember you have to pay all that money for heating,
water damage to ya house due to evaporation,
wont be able to see it properly in a stock pool,
pools are ugly anyway,
money to feed it will be huge,
money on water changes,
just a rich mans fish if you want my opinion, not worth keeping unless you have a tank along the lines of arapaimags multiple thousands of gallon or a nice outside pond in an area with adequate climate. even in a 2000g tank is cruel.
you wont be able too sell it when its 2 foot either, you would have too pay to shift it or kill it.
not shooting you down mate as i have done the whole rtc in a 180 thing and planned ponds that never materialised... would love for you too create a nice home for him... if you really plan to do it i would love to subscribe to a grow out thread if you are going to do one?