macro are the macro nutrients that the plant needs most of... NPK. Which is nitrogen, phosphorus, and potassium. There is a dosing called EI natural which refers to the fish providing all the nutrients for the plants or something along those lines. I think it'd be a good read. As long as you don't use 2.5 - 3 watts per gallon I would think EI natural might work. I'm really not an expert on EI natural, however I know that if you use high wattage lights on you plants then you need to give your plants a lot of nutrients and co2. The way I think of high wattage lighting is the wattage of light is like a person's pace. Low light= walking, high light= running, co2 to plants= oxygen to the person. Since plant photosynthesis is driven by light the plant is forced to work more when wattage is more. When a person walks they can breathe normally and maintain a normal moderate diet, however when a person goes running everyday they consume more oxygen and tend to consume more food (nutrients). So, same with the plants. If they work more then they consume more. If you don't provide enough nutrients then your plant can become thin, begin to wilt, and have less intense coloring.