OK...I have a 36x18x24 (65 gal) tank. I am curently running a Coralife 36" Freshwater 2x96 192W light. I am now convinced that, based on poor plant growth at lower depths, that metal halide lighting is necessary for my deep tank. Although I'm not clueless, I am no where near proficient in what is necessary for optimum application of metal halide lighting. Any information that can be provided will be appreciated. Thanks