As you can see all baffles and dividers are black to block light from the fuge area. I like the alge guard going from the fuge to the skimmer area. This is the 48 inch model going under a 180 the fuge holds I think 21 gallons and the skimmer area is huge. All bulkhead and heater holders and dosing fittings were included not extra like son other builders, shipping was included.thwy have a full line from small to large of sock sumps, trition sumps, also red sea reefer sumps. The build quality is great. Fit and finish is great. And I think it will function well, it's well laid out with plenty of room.