For sure bump his temps up, try 80-85.

Pac mans do not need extra heat unless your house is cold. I would use a small wattage heating light before I used a heat pad.

Also, they breathe through their skin so coco fiber may not be the best substrate, you could add some moss to it or switch to something like Jungle mix from ExoTerra.

Covering the tank could possibly throw of it's circadian cycle (night and day) add a plastic/silk plant or some cork bark to give him some where to hide if you think he needs it.

 Stick to one or two types of food, you aren't going to figure out what he likes by offering him every thing under the sun. They only need to eat two or three times a week. It may be that to much activity (getting in and out of his cage) is causing him to be "anxious" and off feed. Try leaving him alone for 48 hours and then offer one or two crickets and see if he eats. You can put a piece of carrot in his tank and leave the crickets in there for a day or two.

My pacmans never had much of an appetite when kept at room temps, I highly suggest you warm him up and then try offering him some food. Most good caresheets I have read say day time temps need to be at 80-85. I agree that if you use an UTH you need to attach it to the side of his/her enclosure, they often burry in substrate to escape heat.

Hey I just met you. And this is crazy. But award some points. Close this question, maybe?

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