Ok so the UVB is good is it the 12% bulb your using? And distance should be 12-15 inches directly above the basking decor - your basking light should be a clear solid bright white bulb that keeps temps 95-100 F -- its not on in the pic so I cant really tell what it is-- but you must have digital probe thermometers to get those surface basking temps- the tank looks nice - once we get this figured out we need to move on to why hes not eating -- the bobbing and black is usually a sign of mating - can he see his reflection at all in the tank somewhere ? how big is your tank ?