I lost my flower that I've had for a little over 3 1/2 years. Really did love this ray I even had it eating massivore. Man it just bummed me out bad to see him dead.
I can understand that this is a sad day for you... but about the conditions in the tank...
Have you keept him in there for 3 1/2 years? In that case i personally think it was best this way. Sorry m8.