I'm just setting up my first large tank now, I'm going to put a sand base with 2 Amazonian looking plants in there. First of all, I'm wondering if the 65 LB bags of sand I have for mixing mortar in my basement will work for the tank, or do I need some kind of special aquarium sand? Also, it would be great if somebody could point me at some Amazonian plants that can get to be about 1 foot tall and not invade the tank.