Even before buying/introducing new fish to the fish tank, my pleco has very visible areas of skin which are shed, revealing lighter skin.
Sheds of his skin can be seen floating around in the tank.
As far as swimming is concerned, he is okay but usually his fins are up, now its more usually down.
He still eats as usual.
Worried about infection.
Should I give antibiotics or any other treatment?
Photos of the white patches/lines :