Hey guys! I just took a trip to my local butterfly conservatory, it's called "Magic Wings" and is a great place to go to relieve stress. Upon arriving, I noticed they had all sorts of creatures, from butterflies, to reptiles and amphibians, and scorpions and birds. I saw a red-eye in a glass aquarium and there was a sign saying they were selling babies! I've wanted once since I was about 10 (I'm 22 now) but I never trusted a pet store. The conservatory had a guy named Fred who breeds and cares for the frogs himself as a full time job, and guaranteed the health of all his frogs So I decided to take a red eye home. Fred has had a lot of experience with frogs and he seemed like a trusted individual on how to care for them. They even set up the tank for me on the spot. The tank is a 10 gallon tank, with a real plant inside. I believe it is one of those "false bottom" tanks. The real plant is submerged through sphagnum moss, and then planted in real, clean soil. Underneath the soil looks like there is some sort of rocks? I'm not sure what this is but I think it collects excess water. It comes with a non-heated lamp and a fake rock wall for the back. I just have a few questions to start off and I'm hoping you all could help.
1. Does the rock at the bottom need to be replaced, and what is it?
2. Fred told me the temperature needs to be between 60-85? He said room temperature is fine as long as I'm misting. Can I just get a spray bottle for the misting? Fred said it would be fine but I want to make sure.
3. Should I get a temperature and humidity gauge? The man at the conservatory told me it isn't necessary, he said as long as your home is room temperature, the combination of misting and the setup of the tank (sphagnum moss etc) should keep the humidity just fine.
4. Do I NEED to coat the crickets in vitamins? I'm feeding them carrots, which he said should be fine too.

Thanks