dRop eYe

I have heard about Droop Eye, is caused by food falling to the bottom of the tank?

Droop Eye is NOT caused by Arowana looking down or feeding off the bottom of the tank!
The scientific cause of Droop Eye is a fatty deposit build up behind the eyes of the fish, this is caused by over exposure to light, high stress levels, poor diet or any combination of these. To avoid droop eye, make sure you keep the fish in good condition, calm and balanced nutrition. Some fish are genetically more susceptible than others.