Help arowana!!!!@@@

[fishman1]

Help arowana is not eating and is resting at bottom and near the overflow. I got him 1 month ago and when i first introduced him he would lay at bottom and not eat but 2 days later he was swimming at the top and eating 3 shrimp a day. But starting 2 days ago he wouldnt eat the shrimp and is now always resting at the bottom or near the overflow, but when i start walking near the tank he starts swimming crazily and slams into the glass with his face. Whatt is happening plz help!! He has grown 2-3 inches since i got him now he is about a foot long he is in a 180 gallon custom made 7 foot tank help@@@@

[nacra99]

PLease list some of your tank parameters. it'll help people diagnose the problem
pH, Temp, ammonia, nitrItes, nitrAtes.