I'm trying to figure out if I should start treating this pleco. I'm not sure what happened. I had posted last week about pleco trying to get behind the intake of the Aquaclear 110. He looked like he scuffed the side of his head. I did several water changes this week hoping he might heal any injury. I also added extra stress coat to help heal any injury. Now I'm wondering if he was rubbing his head bc he had some other issue. I got a new sponge filter Friday and yestetyes I saw him sucking on it and rubbing on it. If I do have to treat him, I don't know what to do as I'm supposed to leave for a week Tuesday night. He's in a 125g with three clown loaches. I have an extra filter that's been running that Ive been cycling to put on a 10g QT tank that I was gonna setup to QT new fish when I get back. If I put him in there I'm worried ammonia might get too high. Any advice? Thanks Edit: Ammonia, nitrite and nitrates we're zero when I tested Wed. Should still be zero since I just water changed yesterday and there are only 4 fish in this tank. Only stress was new powerheads and I rearranged the decor ten days ago.