Man I'll tell you what, the coco just kept swelling up and gave us some real knucklheads. The one out of place looking beast is grown from seed and the quality does not stand next to its sisters. I run coco with tap water that comes out at 290 (500scale) and I kept the coco at 750ppm, only hitting 950ppm three times. That is just as low of an ec as the UC (UC was ran with ro water)with stellar results.. The coco took more water and more nutes to complete the run which is the least concern to look at between the two. I am very impressed with the coco. I am ready to try the UC EARTH now...