monti loosing colour

[moosehead]

So i got a monti frag about 2 months ago and when i got it it wasn't the nice green as in the pic, more like a dark grey color has been doing good but the colour is drasticly fading went to green now loosing all colour to a pale white. All my other monti's,birds nest,acro's are doing good. There's 2 pics one monti is really colourful has always been like that and you can see the diff from the other one is it bleaching out? I believe it came from a tank with led's i'm only running 4x54w t5's,it has taking around 2 months to have this color change anyone have any idea's here are my par..

sal 1.025
NO3 1-2
phos doesn't register using api test kit
alk 8
cal 330
mag 1300-1320
temp 79.5-80
Everything remains stable i dose everyday.