UPDATE!!!
I went to so cal for a week and left Jr in my mom's care. She was too afraid of the crickets to feed him any of those, but she went worm hunting in her plants(which are in pots). We grow our own worms outside in big pots, they help our plants grow big and strong then they get fed to my big and strong pac^^ He loves his worms now and has even denied his crickets. Mom gave him tap water and let his tank dry out almost completely even though I gave her instructions and showed her all his stuff. He's fine now, but he's not very happy with me. I took him out and gave him a warm soak in treated water. I boiled his tank and got rid of his old bedding, so far the plants seem to be coping just fine after their hot soak too. I needed to make sure the mites weren't in the plants too. I'm using a new coco fiber and I'm not sure he likes it very much because it's not as fine as the stuff before. Those mites were hard to get rid of, if they come back now I have no idea what to do next....
I almost forgot! his weight is up to 2 and 1/8 oz now. When I got him back in August, he weighed less than .5oz