Basement floor unlevel= overflow weir unlevel. Help James Cameron. Or anyone

[peterlvll16]

I knew the basement floor was unlevel, it with my custom coast coast overflow *48 inch. i still am only getting 3/4 of the length letting water in. I believe the right side lowered 1/8 at the most would solve the problem.

Unfortunately this is a custom design I did, and the overflow does not have a back. It is siliconed to the back of the tank.

If your answered is to put a back on the overflow, involving taking it off removing all silicone and trying again thank you but I was hoping to make a weir inset that would raise itself on the high side , limit flow and lower left. A 48 inch. ballast I could make with a acrylic sheet I have I guess. Any hydrology experience out there or any experience with similar situation

I appreciate all the professional advice I can get. I have a 15 month year old -- hence d.i.y. save $$.

Images Show left water level & Right water level.
Picture of overflow. As you can see if not cap similar to a synergy overflow. I think creating one buoyant is possible.

Thank you

 

[mrpizzaface]

If lowering the right side would solve the problem, then raising the left side should do the same thing. I would shim the left side of the stand/tank up as much as needed to level the aquarium.