Bren501
Aquarium Advice Apprentice
- Joined
- Jul 20, 2014
- Messages
- 10
That looks more like Fungus to me. The Pleco likely injured itself allowing the Fungus to attach itself to the damaged tissue. You might try a disinfectant med like Melafix, plus keeping the water pristine.
Paraguard. A SeaChem product.
Looks like Columnaris to me.