ethnics;744688; said:a jardini if any needs the widest tank possible out of all the aros for 1 main reason, jardinis can NOT turn around like silvers. if u wanna push for a bigger tank of any species of arowana, it should be the jardini...
I agree. I once saw a 20" Jardini kept in a 120g with 18" front to back. It had to swim upward to turn. Silvers (and blacks likely) don't have problem turning in small radius. If you are in Chicago, visit Shedd. The black (easily 3') arowana in their Amazon exhibit is able to turn in 18" space at the far left corner of its display tank (somehow it also happens to be its favorite spot!).