Buck - thanks, i'm going to put a few plants into the water part, and I figure some algae should fill in a bit for the natural look, but thanks for the suggestion with the sphagnum moss. And yes, there's a pump, it will be at the other end of the water area than the waterfall, pump water through the white pipe/tube and then fill up the waterfall reservoir and gravity should do the rest. At least in theory
Hop - yes they are acrylic, I used a small tube of Lexan in some of the areas i couldn't get a large silicone tube in a caulk gun into, and the lexan sealed areas are the ones that dont seem to be leaking, so i purchased a larger tube of that to put into the caulk gun, i'm hoping that will help! And specifically aquarium silicone is what is holding the seams of the wall together, and that doesnt seem to be leaking either. I'm hoping something will work! I might use the epoxy resin as an insurance policy for the bottom seam that will be under the most water pressure, and hopefully i'll finally get this thing leak proof so I can set the rest up!
Thanks for the suggestions!