My powerheads were off during the video, because with them on the clown ends up swimming on his side in one of the corners of the tank. That's one of the reasons I put him in the gallon. It has holes in it so there's flow and everything. Also he eats off the bottom of the container. I don't know how to feed him if he's free in the tank with the others.
If you're referring to him being stressed from being stuck in a small area, I can understand that. I'll remove the container then. I don't have a ph test at home but I'll take some water to the LFS
to get tested tomorrow.