Do's:
1.) Have a tight fitting lid covering your tank at ALL TIMES! Arowanas are jumpers by nature and if they see a fly or insect they will jump. Or they will just jump from natural instinct. Often times, I've found too that aggressive tankmates or bad water parameters can cause them to jump.
2.) So that leads me to tankmates. AVOID the aggressive cichlids. Keep with things semi aggressive like oscars, pbass, silver dollars. You will need a large tank,
3,) BIG TANK!
4.) Feed market shrimp, carnivore sticks, and insects.
Dont's
Leave the lid open at all!
House with aggressive fish