High ppm

Hey you don't need to measure anything on the process, sometimes different values ​​come out. Keep it up 👌👍

Sounds like you are in soil. If this was your first feeding and you got that ppm level I'd bet its just some of the natural nutrients that leeched out when you watered. How long has it been since you last transplanted? What soil do you use? Generally most soils will feed the plant all it needs until 3-4 weeks after your last transplant. Honestly your plants look pretty good, though a bit dark green but thats nothing to worry about yet. A little nute burn isnt an issue if it happens, youll see it pretty quickly before it gets serious. In fact i purposely nute burn my plants a small amount as im figuring out the nute doses my plants like. I do this because as im increasing my dosage i watch the plants for nute burn to know ive gone a little too far and need to back off. I see you flushed already. I dont think this will hurt the plant at all. If anything you washed out the nutes you just put in as well as washing out some of the nutes the soil already had in it. If you need any more advice feel free to message me.