Your tank is adorable! Unusual description of a reef tank probably, lol
Very cool blue porcelain crab, I gota get one, invert lover too.
Do you have a tight top on that tank? If your limiting your oxygen available to the water you might want to add an air stone. Oxygen plays a very important role in Aquairums.
http://voices.yahoo.com/what-does-oxygen-marine-aquarium-1606669.html">http://voices.yahoo.com/what-does-oxygen-marine-aquarium-1606669.html</a>
Edit: How about a full tank pic?