finishing touches on 20 long

[ringfinger]

Current Stock:
Percula Clown
Firefish
Cleaner Shrimp
Emerald Crab
Several Hermits & Snails

The tank is an AGA 20L with reef sand, 30 lbs of live rock, 375 GPH flow, and 130 PC Watts of light. Everything has been going great for a couple months now and all the inhabitants are eating and happy. I am very religious about weekly 10% water changes and probably won't miss one anytime soon, so I kinda figured I could handle one more critter. Any suggestions for a final fish or invert? Am I already full?

I was considering one of the following:
Yellow Watchman & Pistol Shrimp
Jawfish
Clown Goby

 

[austinsdad]

I'd do the watchman and shrimp combo. Just make sure the rock is firmly planted on the bottom of the tank and not sitting on the sand. The pistol would topple it burrowing underneath. Nitrates in order? Near zero?

 

[ringfinger]

Nitrates measure about 5ppm or less right before a water change. I will be waiting a little while before I add anything else but just wanted some ideas. Thanks, and I will have to make sure my rock is stable if I go that route.

 

[austinsdad]

http://www.liveaquaria.com/product/scateg.cfm?pCatId=1852

Got a few options on shrimp gobies....

 

[Ksnell]

Your reef sounds exactly like mine. its a 20 gallon, with 30 pounds LR, a perc, a firefish, a cleaner shrimp, a turbo snail, and a bunch of hermit crabs. i just today bought a green clown goby (acclimating as i type), and i think he's going to be a great addition to the reef. how's the emerald crab doing in your tank? does he nip at your fish? if you have any pics of your tank, you should throw them up.