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Just a quick following after going down a bit of a rabbit hole of discovery on plant nutritional requirements. Looks like the ideal NPK for all stages (ppm/day) from emperical data is 194, 58, 194 - at least based on the results of a comprehensive dwc trial, links below. The fertilisers major...

((Grams÷Litres)×DecimalPercentOfElement)×1,000 = ppm At the recommended 8g/4.5L from the box; you get, in ppm: 248.8 N, 46.2 P, 373.3 K and 154.6 S It's completely lacking Calcium, and is very low in Magnesium. All depends on situation; but my guess would be good results if fed every 48 hours...