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Started the week with the trio getting 4ml per gallon of all the flower nutes and cal mag, and by the end of the week I bumped it to 5ml. The Ppm's ranged from 960 to 997 from the 1st watering to 1110-1115 for the second watering. My water plain has around 350-380 ppm. So far no real problems, the water coming out is usually 1 point less then when going in.