From experience I would not do a DSB in a small tank. I did get denitrification but it also accumulated a lot of crap that didn't break down fast enough and looked icky. I'd look into growing some macro algae in your display and pruining it off periodically. Caulerpa is probably the easiest to work with if you are doing it in the display but it can get out of hand. Also you could get a small hang on back refugium, CPRAquatics makes a nice one and there is a knock off on Ebay that is sold regularly - this owuld allow you to keep the algae out of the main tank and additionally give you some natural filtration and food.


If you want some live sand or some algae let me know next time your in Austin I'll hook you up.

-Mike