WOW!!! That is going to be so cool, you must be very excited, I know I would be!!
They do make tanks these days that have the filters already built in, and a wet/dry filter is a good method to use. I am sure you will be happy with it. It sounds like your heater is in the filter also, and as your filter returns water to the tank it breaks the surface providing the air for the fish. Texas Holy rock is great, and you are going to have a lot of fun setting this up and getting fish!