hello, friend!
since your post isn't broken into paragraphs it made it a bit hard to read. consider that next time you have a long post so more people read it. i mean this to be productive and not mean-spirited in any way!
so reading through your post i have some scattered comments:
• ditch any analog/dial/non-digital thermometer/hygrometer. they're almost literally useless for a species that requires such specific husbandry.
• an under tank heater (UTH) does nothing to raise ambient (air) temps. if your enclosure is reaching as low as 70° F you will need an ambient heat source on a thermostat to raise temps to the appropriate degree (77-82° F). a lot of people on the forum have great success with a CHE (ceramic heat emitter) as have i.
i hope this helps get you on the right path to proper husbandry! if you have any more questions feel free to ask.
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