Help with water quality. Add fuge?

[digi]

Hi all,

I have a somewhat newer reef. Its 5 months old and consists of a 9 gallon display, a 5 gallon sump, both without any sand, but about 14 lbs of live rock (split amongst the two tanks).

Ive still not yet reached 0 nitrates (ammonia and nitrites are 0 though), and am wondering what I can do to aid my water quality.

Here are options, what would you prefer?

• Should I add live sand to the sump? (I dont want sand in the display)
• Should I setup a fuge? (what are the benefits)
• Or, if i shouldn't set up a fuge, should I change anything with my sump setup? Perhaps different spectrum lighting? Bioballs? Suggestions?

Helpful info on my setup:

• Sump (5gal): Its basically bare bones except for live rock. All its got in it is my equipment: filter, heater, ato, and about 5lbs of live rock. Also has some weak-bones lights on it. Ikea LED's... mostly white, probably 5000k.
• Display (9gal): Has Nanocustoms par LED spotlights. These lights have only been on for about a 3 weeks - and I've currently hit an algae bloom.
• Livestock: LPS - (torch, octospawn, alveopora). Softties - a few zoa's. A couple gobies (clown, neon, another that i cant think of its name right now). Tailspot blenny. Cleanup crew consists of 2 turbos, 3 pretty active hermits. I think they're doing their job pretty well.

Opinions, comments?