I am adding plants to my 65 gallon, and have some substrate in the tank already that i purchase from my LFS. The owner had the substrate in one of his personal planted tanks at home. On the other hand i have eco-complete gravel which was recommended to me for plants. The gravel actually dissolved somewhat and turned into a dirt-like substance on the bottom. I mixed in some crushed coral or aragonite.. can't remember which. Either way, both substrates are a "lighter" gravel and were for planted tanks, which would you guys recommend? I think i remember reading somewhere that aragonite was beneficial to plants.