The dimensions are 20x20x20. and after looking, and doing the math - the actual volume of this tank would be more along the lines of 25g - 27g before sand/rock displacement ...
My BF's personal take on this tank (he's Mr. Saltwater, at least in his book, has a 265g display, 400g total tank)...
The ATO leaves a little to be desired - but we can work with that ... we might just make that a kalk topoff, or 2 part topoff. We will have to play with that.
The skimmer seems to be built decent. Only had it out once, and wasn't paying too much attention to it to be quiet honest. The skimmer is already going nuts - seems to finally have slimed up enough to produce and bring the bubbles up it's neck. It is a little loud though, and I really wish they'd have put some thought into the wire management, and lenth of wires.The cables are too short on these pumps, and there are no cutouts int he rear glass for the wires to disappear seamlessly under the edge - the tank is 20" tall all around, so the wires pop over the rear edge - very visible. :-(
The cabinet was a PITA to put together, and I just spoke with another LFS that has one on display - they had the same issues as we had. The rear pannel (pressed wood) is a little too think for the slot cut into the LEFT & RIGHT side pieces - it took us a rubber mallet, and KY to convince the panel where it should go ... the screws are cheap, and love to snap heads + round out the heads. I'd NOT use their screws next time.
As for the glass tank itself - quality seems up to par!
I've heard that Nano-tuners is back ordered three months on this tank from the LFS that I purchased my tank from. And don't forget to add shipping costs for the tank, it wasn't cheap when I was looking to purchase from Nano-tuners.
In all I give this tank two thumbs up!