Hi everyone. I currently have a 125 gallon discus tank that has a sand substrate. I will be making a canopy for it after the holidays and I am wondering what lights and how many should I put in. I do not want metal halide lights at all. The tank is 6 ft. long and 20 inches deep. About 4 feet of the tank will planted and the other area will be open. This will be a low tech with no c02. For a 20 inch depth, what kind of lighting would work. Heres a picture of the current set up. In this picture the light is brighter than it looks.
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