hmm faded plakat?

[Friendlyfishies]

I switched miyagi the plakat over to a 10 gal from his 5 gal this week, I noticed upon the switch his dorsal fin and the top of his tail faded from brick red to grey?? Hopeing the color comes back. His five gal was low lit and has IAL leaves which kept the water dark, wonder if this would cause fade? He behaves and eat normally so I dont think anything is wrong with him and I dont think its disease or anything, just fade...but im just wondering why? What can cause him to fade like that?

[LizzyP]

Could be stress from the move. My VT will lose color pretty quick during water changes if I cup him.