I am looking to pick the brains of some of the knowledgable reefers on this site. I currently have the HQI Aqualight Pro with 150 metal halide on my 58 gallon aquarium. For the past year and half I had been using the Coralife Power Compact on my 29 gallon, with outstanding success. Now it seems as if I cant keep the tank clean. I am wondering if this might have something to do with the light or the duration of the light cycle. I am sorta frusterated and considering going back to the Power Compact lighting. I dont keep any SPS corals or clams so I am wondering what the general consensus would be on this topic? Also it seems as if I am having an outbreak of diatoms all of a sudden which I am assuming is caused from my friend topping off with tap water a few weeks ago. Is there a quick way to get my rocks back to normal instead of the copper brown color? Thanks in advance.