hey guys, I have a 29 gallon angelfish tank that I want to make into a low light setup. Now I don't want to spend tons of money on lighting, is there anyway I could turn what I have now into a low light planted aquarium without spending tons of money on light? And what low light plants are there besides Java fern, anubias, and crypts? I'm looking for a backround and foreground plants that you put in the substrate so it will fill up space. And will I need any special substrate for the plants being planted in the gravel? the tank is 18in deep with about 20 watts