Toxins rose significantly after adding first fish

It's in the direct flow of the water through the chamber.

I think the reason why he sat in that one spot is because he has trouble with the current in the tank. His left bottom fin is constantly shriveled like it has been injured while the right one looks fine. He looks like he has trouble swimming because of this as he swims in a wobbly fashion compared to other clowns I've seen.

I don't know how my flow should be directed. I have a powerhead in the middle of the tank that I can't move cause of the build in sump that points slightly left and out towards the glass, one on the left side of the tank which was pointed slightly right towards the middle of the glass to collide with the first which I have now moved to point all the way across to the right end of the tank and another one which I havent placed yet since I have no clue where to put it. Was thinking about the right side pointing left a few inches below the flow of the left powerhead but I dont know.