Hi,

Thats the problem I'm having trouble understanding - if the tempgun is saying your surface temps inside the warm end hide are 74f then you haven't got the hot side right yet in all probability.

I would suggest putting the acurite prob inside the hide on top of the substrate then waiting an hour and seeing what that read - if it says 74f then you really need to think about removing the substrate and trying something like a couple of sheets of newspaper to see if that makes a difference I think.

The extra flexwatt should help boost cool side temps but would suffer exactly the same substrate problem in all likelyhood.

If the cool side flex doesn't appear on time you could try some short term measures like a red bulb (controlled by a rheostat ) placed a couple of feet away but shining on the cool end - it's a pain in the butt to control which is why I say short term and you must make absolutely certain it doesn't overheat the tub.

I'm not sure what else to suggest really - apart from something drastic like an mdf frame to make it a one slot enclosed rack.


dr del