What I'd do differently next time.

[Pescador]

Our in wall faces to our home theater which is also front projection.
(a Sony VPL-HS51, Brightness:1200 ANSI lumen's, Contrast:6000:1)
The tank lights have a four stage dusk that starts at about movie time in the evening. We always planned to have a curtain for it but haven't needed it.
Just curious how do you know what acoustic treatment your room needs before everything is set up and you know how it sounds? We wanted our room to be more multi-function than dedicated theater so we just tried to keep a mix of hard and soft surfaces.

What I'd do differently next time? Not too much, better ventilation for the lights, R/O output lines roughed in, more room around the back sides of the tank. Even with having to do some demo to get a 36" wide tank down the stairs it turned out pretty good.

Best things we did? Structured wiring, access to the back side of all the home theater electronics, combining a fish room and hobby room, roughed in water lines for R/O D/I, laundry sink, lots of blocking to attach equipment to walls and ceiling.