I would like to put live plants in my tank but I have a few questions? When I first started my tank I knew nothing about live plants so I went with a all gravel substrate and plastic plants. Now a year and a half later I have decided that I would like to take a shot at live plants. I have already increased the lighting wattage in my tank. I have also decided on medium to low light plants. The main plant I want to get is an Amazon Sword Plant. I will not be adding CO2. I have read that you can have plants as long as you add fertilizer to the tank. Is this true and what kind of fertilizer should I use? My main question is will I be able to grow plants in an all gravel substrate? Any help is greatly appreciated!