My scoly use to blow up big time after spot feeding it.. I then stopped that for a bit, not it barely explodes and eats like it use to.. Just takes in little food.. So one thing I learned is def feed them weekly, I think it's a must..
Yea it looks liek it's bleaching to me also and I think it looked better before. Maybe try putting it in a different spot with less light..sounds like you have an insane amount of light in the tank..odd the warpaint scoly next to it isn't changing color though. What size tank do you have? I'm guessing 300+