I have no idea where to begin. My tank is a 55 gal. with play sand as the substrate and my lighting is the light that came with the tank so each bulb (has 2) is only 15w. I only have one filter at the moment which also came with the tank. I am however buying another filter from someone off the classifieds on this site to add as a second filter. Can someone point me in the right direction for what I need to do in order to be able to have real plants and have them thrive?