Newb with Substrate Q's
I'm planning a low tech 29 gallon tank with bleeding heart tetras, silver hatchet fish, and dwarf chain loaches.
My question is about substrate, which is the best choice for a low tech setup? I'm guessing it's ADA.
Also, please tell me if I'm right on this:
ADA power sand is the base substrate that provides all the nutrients and such to the plants while Aqua-Soil is the top layer that is decorative and lower pH?