I only use eco earth for my pacs. It holds moiture great, and is perfect for them to dig into.

Your temps are ok for night time, but for the day they should be around 82 degrees.

They don't need UVA or UVB, so I use 50W infrared heat lamps. I mist my tanks at night, and add some water to the eco earth as needed. I've never had a problem with the lamps drying the soil too much.