I have 12G JBJ Nanocube with modified light with 92w. I am very happy with the setup but lately I noticed that my pump shooting out some air bubbles and it drives me crazy to fix this problem. I might have to go out and get new pump to see if it will fix that problem. Other than that, it's pretty nice.
Alot of people have that problem. Hopely my nano doesn't crack, my wife will kill me if it does. Go to nano-reef.com, you'll see alot of message regarding that issue. Mostly 24G but I've seen few 12G cracking nowaday.