Elvin
Banned Troll
If you are growing in soil measuring runoff ppm is usually not done.
Mix your fertilizer per manufacturer's instructions (do not do that 1/2 nute nonsense), water to a 20% runoff and you will be fine.
Mix your fertilizer per manufacturer's instructions (do not do that 1/2 nute nonsense), water to a 20% runoff and you will be fine.