Pleco turning white ish colour ???

Tilleetot

New Member
Jul 30, 2020
1
0
1
29
Ok so I have a very very large common pleco. When I first got him a week ago, all was fine. But since yesterday I’ve started to notice like a white ish colouring appearing over quite a large area of his skin?
can anybody tell me what this is and what I can do ? I’ve attached a picture of him when I first got him, will attach a picture of his discolouration when he decides to come out in the open and I can take a clear pic.