Hey guys, I've been thinking about getting a turtle for some time now, and I decided if I got one the Common Musk would be the best choice, as they stay small and I don't want a huge turtle. My question is is do they need UV-B, as I've heard sources say that since they are nocturnal, and that they do not require it and only need a passive heat source in one area for basking instead of a basking lamp type setup. Is this true? Also, would a 20g long be good for a single specimen?