hey @jimmy the hat, I'm not sure what my runoff EC is at. Honestly at the room thats yellowing it's very strange, I get very little runoff, perhaps 5-10% (on autodrip). The other site I run I'm hand watering and get considerably more. I'm giving 55 gallons a day with the hand water and 100+ at the other. Same formula, same veg times (4 weeks), same pot size (3 gallons).