FWIW, Chris from HR told me to measure The Dirty by grams, not EC. He says the carbon items in the mix throws of the numbers. I used EC first gal used, it took 2x recommended dose....but the plant is looking great. I have 3 SDK plant, and have been doing a sided side x side with RO vs Dirty vs modified 6/9. So far 6/9 is ahead in veg, Dirty next, then RO. I did a side by side with 6/9 vs RO version a long time ago, yield was close, but RO version did not veg as fast. Chris says to use +SIZE as foliar to increase veg growth. He also said trust your plants, not his opinion on proper dose to feed using any of the products. He gave me a sample of the Tap water version, and said people are raving about mixing it with The Dirty. I will have to wait on that experiment for a minute. Will keep updated progress on SDK plants