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keyhole going grey???

2K views 4 replies 2 participants last post by  daisycutter 
#1 ·
2 of my keyholes are going grey/white on top one more than the other its not a fungus its like the color on the tops of there heads/backs is draining away there eating and acting as per normal i know there gotting on but do fish lose color with age?
 
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