I can't believe that tank is still up and running. With an arowana that BIG, its capable of breaking a seal in that tank or even cracking the glass if it was to get spooked or jumpy.
Or even knocking off those light hood covers and ending up on the floor. 



and the once 2 inch arow got to feel like a mini monster as he devours the tetras an neons you gotta train them early right lololol