I'm getting a few long tailed salamanders and I want to make sure my setup will be appropriate for them, as this is my first experience with terrestrial salamanders. It is a ten gallon aquarium with gravel for drainage and coco fiber/fir bark substrate. I broke up slate tiles from Home Depot and a couple cork bark pieces for hiding areas. Also, I have thrown in dwarf white isopods and some springtails. I'm going to do my best to keep the tank below 70 degrees. Also, what humidity should I aim for?