Hi, I currently have a 7 gal coldwater octagonal tank in my office. It houses only 1 large mystery snail and 6 freshwater clams. If anyone in the NYC/NJ area was thinking of starting a little tank for your office, take my critters since I am moving. (I want to keep the tank, though). They have lived peacefully with a lot of plants (also up for grabs) since Sept. 2004. PM me if you can pick them up!