Overflow closeup

This is the intake box. I got too agressive and broke a tooth off over on the right. I glued it back on and it works great. The intake box is connected to the Rear Box via acrylic wingnut. I drilled a hole in the intake box, and glued a piece of plexi to the rear box. The piece of plexi has a strip that I dremeled out so I am able to slide the intake box up and down to control the water level.