Here is a one year update of my Arowana, she/he is at 50cm now, so has grown quite a bit. Growth and appetite have slowed down these last few months. So I think its slow going from here. He/she seems very healthy, and is active and responsive.
The only take mates the Aro allows is still the geos. They seem to be very well suited together, geos have laid eggs countless times. Everyone is happy as long as the geos dont swim at the surface to much haha.
I tried to take the pics with the aro in the same position as before.
It works quite well. keeps it neat and open. I originally did it a while back when I had silver dollars to protect the roots.
I have put the outlets for my canister filters blowing into the one end of the pipe to keep water movement through the roots.