no, its purple dragon strainhigh nitrogen probably. If anything your ppm is high, add more water to your nutrient solution. Is that an autoflower?
i dont really understand... im not using hydro im growing in soilI had same problem with gnats. I first read up about predatory nemadoeds, think that how you spell it. But found out easier way. I got some H202. Basically dose resivour up with this and the gnats die within days. Just keep cleaning resivour water every feeding to get them out root mass. Hth