[tang daddy]

Plus one to comment above!
adding a weir and tinting is your best option. A weird story but true... a friend had a piece of acrylic that was silicones to the back wall, they probably skimped when siliconing the back acrylic and as a result it started bowing the water that was trapped in the back between the glass and acrylic overflow went stale because of no air and water movement. Needless to say he lost corals and I think a few fish. It's a simple thing that is overlooked but I'd either remove the acrylic and flatten it out using a heat gun to bend it back flat and cut abit off the side so it fits better or just paint/tint and install teeth.