Hey Danne,
some questions first...
Where is the tank?
Is that room (area) cold?
Do you have a warmer location you could move it to?
Have you closed off most of the top?
Have you insulated the sides? You could even insulate some/much/all of the front in addition to the sides as a temporary fix until you get your new cage.
A UTH will only put out so many therms of heat. If the overall system is "leaking" out therms at a similar rate you can never get the temps up. Two ways to fix it, pump in more therms or even better, stop the leaking out. You've tried the pump in more with a ceramic heater and found it dries out the enclosure. If it's drying out the enclosure, the moisture MUST be escaping!!! You really need to close off MOST of the top.
To keep the heat in, insulate insulate insulate!!!!!!!
For example, I have a quarantine rack in a room that gets very cold. Standard melamine rack with belly heat. 3/4" melamine is a great insulater but the tubs were cold towards the front where they were exposed to the cold room. Only thing I added was a heavy blanket draped over the front of the rack. That keept the heat in and the snakes in the tubs nice and warm!!
>>It also might be the fact that the cage got so dried out by my ceramic heater, with the light I didn't have to spray anymore but it wasn't hot enough with just that and the UTH. I want to use something else instead of the ceramic bulb so that I can keep the humidity better, what do you suggest (I'm working on getting a cage instead of the aquarium, but for the time being)?
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Thanks,
Dave Colling

www.rainbows-r-us-reptiles.com
0.1 Wife (WC and still very fiesty)
0.2 kids (CBB, a big part of our selective breeding program)
LOL, to many snakes to list, last count:
26.49 BRB
20.21 BCI
And those are only the breeders 
lots.lots.lots feeder mice and rats 

