Plant issues in my Viv

[kindasleepy]

Hi! I'm new to the forums. I have a vivarium in an ExoTerra tank (the Sri Lanka version with the Buddha background). It has two cresties in it and several species of plants. I have a 2" dead space at the bottom with a eggcrate subfloor with craft mesh on top. My substrate is about 3-4" of tropical soil with a layer of bark on top. I have some lucky bamboo stalks, a bromliad, a parlor palm, mother in law's tongue, and some pothos. I've tried english Ivy several times but it just dries up, every once in a while I lose a bamboo stalk, can't get mosses to grow, and my bromliad is loosing all of the red in the center. I'd like to try to add Hedera ivy and I'd like to track down some mosses but not if I'm just going to kill them. So here's the question, should I be using something different as substrate? Is it my lights? I have two CFL full spectrum 15w bulbs in the hood. The only plants that are doing really well is the palm and the pothos. Everything else just doesn't seem to grow.