I don't have smoked glass but due to my quick draw on buying cut glass I have an extra 12 inch piece was gonna paint the inside and silicone together two 3/16 pieces together to make a black out wall for my refugiumYour baffles look similar to my Triton sump. I have your first 2 baffles switched around to keep my cheato away from the overflow. The second set just has an upflow into return section, I was worried the flow would push out media bags but they are okay.
I could not tell from your design but use smoked glass in the refugium to cut out light from skimmer section.
Really enjoy sump builds!! Thanks for sharing.
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