Light Blocking Wall

[Torqueroll]

I have a Nuvo 30L and am getting a lot of light 'feeding' growth in the sump area. Has anyone built a light blocking wall for their AIOs? I have ideas but am also a firm believer in 'not' reinventing the wheel.

 

[hijinks7]

pretty easy to order a black piece of acrylic and cut it out so you have a lid.

 

[Torqueroll]

pretty easy to order a black piece of acrylic and cut it out so you have a lid.

Problem with covering I think would be items (wires, light brackets, skimmer, etc..) rising above sump area. Sketch is the my thought process/idea.