^ Actually those nature aquariums are pretty low maintenance. You only replace about 15% of the water at any one time. You don't need to rip it apart for cleaning as the fungi in the soil breakdown the fish waste to make nitrates for the plants, etc.
I'm new to the city and discovered the store yesterday. 5 floors with a bar on each, excellent. They're having a big big sale now, most items marked 50% off sticker + an additional 25% down. I also learned Wilkes sold to Mitchell's, http://www.mitchellsonline.com/, last year. The SF store will be undergoing major renovations this year.