Mildly intrigued by a salt tank

[Ruth]

I know it's been a while since you posted this so don't know if you are still following.
I have a 12g. JBJ Nano cube set up in my office that is just florishing. I currently have a blue devil damsel, tomato clown and a bunch of zoos, green star polyps, mushrooms and xenia in it.
I change about 3 gallons of water every 2 weeks, rinse the sponge filter - feed the fish on most weekdays (I travel in my job so am not always in) and that is that.
The only thing I added for additional equipment was a small powerhead.
Everyone that comes in admires the tank and comes by regularly to check on the fish.