Hi my name is Josh and I am having issues with my fire eel. He is eating healthy and daily. I added a new decoration for him to hide in and now he has a white hole on him the really white spot on the picture. he also has quite a few grey/white areas as u can see closer to his tail it's mostly on one side there is a little spot on his other side as well. There is quite a bit of damage on the one side. I'm just worried about him can anyone tell me, if this is just scraping or is there something else going on here.There is quite a bit of damage on the one side. tank parameters are good just did a 40% water change it's only been 3 days since the last I normally do once a week water changes. He is in a 160 gallon tank and his diet is pellets and blood worms mostly, he refuses most other foods including shrimp and night crawlers. He is eating well and is semi active comes out of the cave during the day a few times at least when I am in the living room. Any help would be appreciated.