I'm using a digital thermometer with probe to measure the uth. Embarrasingly enough, I don't have a digital hygrometer yet. My apartment should be sufficiently humid though, I have 7 larger fish tanks. I regularly detach the probe to measure ambient and cool side temperatures. His belly's been slightly pink for a bit over a week now, but its been more noticeably so the past day or two.
Here's a shot of the tank, its a 20gallong long
http://www.monsterfishkeepers.com/fo...ictureid=32329
His skin seems a little dull, not overwhelming though. I haven't seen any cloudy eyes yet.