Long tanks offer plenty of room to chamber for a skimmer, sand and macros, and return pump(s). Water level doesn't have to be very high to be efficient, and most internal skimmers operate efficiently between 7-10 inches of water. 12-14" of water depth in the skimmer and refugium chamber is plenty. Depending on how tall the long tank is, there should be sufficient space left in the tank to hold all of the water that drains into it after a power cut.
+1. Good advice. Know the dimensions of your skimmer and return pumps before assembling the chambers...
How long has your set up been up and running? Silicone won't stick to plastic, any little movement and it will all come apart. I tried everything, and finally had a class cutter make baffles for me to put on my glass tank. It's been some years, have they improved silicone?
Yep.
I have a glass sump with acrylic baffolds and havent had any problems either. its been running for 8 months now.
**************.com has a carbon reactor which you can place inside or outside of your sump. I just ordred the dual carbon/GFO reactor today and only set me back about $150 with the media.
I too used that system, it does work great, the BRS brand is a good one.