This what I've heard/learnt....
This may be due to excess feeding, could be oso cuz Aro was looking down for foods often.
Cover all sides of the tank completely with dark paper. Put a centralised light source, and switch it on for 12 hours a day. Try instead feeding little frogy or cricket(anything that float). Handfeed it if u can...if the Aro allows u too, juz dun let the food sink down to the bottom. Cut down the diet of coz. ohh...try locating the tank to a lower elevation. this probably takes roughly 3mths :|
Or splash it goes to the pond if u got one....it will recover itself in time, but living in a urban/city area...this might be a prob.
Last but not least...pray hard
