Nano cubes are nice. Because of the hood design there's not that much evaporation. They sell 28watt light upgrade kits on ebay for them. There are mods where you can add a skimmer in one of the filter chambers. They're also glass, not plastic, and the "cube" shape is great for aquascaping. Check out nano-reefs.com especially their diy forum. Also check out www.nanocustoms.com - it's a site that sells customized nano-cubes.