Hello, I'm trying to set up a tank with aquarium plants in it. I read in some posts that a good substrate is 2-3 inches of fluorite at the bottom layer and another layer of substrate of about 1 inch at the top. What type of substrate should be placed as this 1 inch layer?

Am I suppose to be mixing anything in the fluorite layer?

Is this a good setup? I'm pretty inexperienced and would greatly appreciate comments before I do the actual setup.

THanks In ADvance!!