Bro if u serious on keeping the two aros.. you might wan to consider this..

double metal stand for 4 lenght by 2 width.. and two aquarium for each aro
you might wan to check out the price by "setapak aquarium"

my situation also same like urs..

have 1 greenie and 1 indo gold.. try to put them together with 2 lampam ... ended up injuring both aros.. if your budget have constraint.. do like what i did..

get one aquarium 4 by 2 first together with the stand for 1 of the aro.. and maybe 2 or 3 months down the road get another one.. coz the present one can still be use..

i got mine from setapak aquarium as well.. but u might wan to consider increase the base to at least 8mm coz of the weight..

my pov.. if u have the aquarium made into 2ft width by 4ft lenght.. u can keep the fish until it grow old and died.. rather than wasting money on 1.5ft width later again have to change..