You could always to it from the end with a canister or two.
This is a plan I am going to do in the future for a shellie tank to be behind a sofa as a room divider.
The side piece where the hoses from the canister are hidden in only 3 inches deep, and the whole shibang in 1 1/2 inches wider than the tank itself (1/2 in plywood and trim on each side).
I am going to use an XP1 (its going to be a 30 gal long shellie tank). The spray bar will push the waterr along the top and down the far short side wall, across the shell bed and blow all the poop and stuff to the intake, at the bottom under the bar. It will be barely visible. I will also use an inline heater so there will be nothing in the tank.