Thanks for all the advice.
Regarding the temperature control on my heater, I'm not 100% sure how it works to be honest. It has a "+" and "-" sign and when I first setup the tank I turned the dial slightly towards the "+" and got it to the temperature I wanted (80f)
I guess I'll just have to wait and see. The thing about Las Vegas is one day its 80 and the next day its 95 so I just didn't want to come home to a deep fried fish tank.