For the last week, Jumbo hadn't been eating well. Nothing changed with his attitude. Nothing outwardly wrong with his appearance. I checked water for any problems...none. He was just not himself. I woke up this morning to find him dead. Needless to say...I'm heartbroken. Hard to believe you can develop feelings for a fish....but there it is. I've taken over 2000 photos of him since he was born. Six days after his 13th birthday. As with all things...this to will pass...but for today, I am going to mourn my pet.