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I would eventually like to convert my FO tank to a Reef tank. I have done everything I know to do as far as LS and LR. Could someone explain in english what I need for lighting? I just have the canopy that came with my All Glass tank and two 50/50 bulbs. Also my water is still at 20ppm nitrates. I need to be at zero, right? What else should be in order? Calcium? I have a wet/dry. Do I need powerheads as well?(55 gal.)