Please watch video to get an idea of my tank. (Yes It's a blog i'm doing every week as I begin my journey in the fish aquarium life.) I have 25 pounds of Oregon Dune Sand and an additional 40 pounds of Eco-Complete. I'm wanting to make my entire tank planted, so I believe I don't have enough substrate. I have a 65 gallon with 65 pounds of substrate. Im thinking of adding an additional 10 pounds of Eco-Complete would add a lot to the tank. Or am I just over thinking it? Maybe its enough? How would I go about doing this to a established tank with over 30 fish in the tank? Could I just take cups of the substrate and slowly add it to the bottom of the tank?