Lockout or not enough nutrients ?

Hey Pal I've done hydros once. But after reading up I learnt a lot. Okay. So generally, at this stage of growth. Their is enough calmag in your water at this young stage of growth. Unless you are rev op water. (No EC) Then you really should stay away from calmag if its just tap And your ppm is way to high. So, here's how it works. Set up your res. Say 300ppm.includinh your tap.. then the next day. If your EC has gone down say by 50ppm then you can add more nutrients. Just drops of nutrients with water. This will stable your PH. As opposed to making a batch and having to adjust the PH all the time. Let the nutrients do it. Every day or 2 after the ppm you have set has gone down If you set your ppm at 850 and the next day is the same or gone up by 50 or not moved and water level has gone down. That's how you know you are locked out with hydros. Not by guessing looking at leafs bud, which are very green. So yeah, you've been in lockout a while now, as your plant will normally take up as much N as it can and by doing so it locks others out like cal/mag and ppl think they have a calmag issue when it's really Lockout from excess N been taken up by the plant. Good luck.

Yeah - it's got way too much nutes! That 850ppm should be down around 400 max for her age I should think... I'm growing an autoflower in DWC and they don't take as much nutes as photos do so I'm actually raising what I give quite a bit to recommend the 400 max to you... You're going to have to flush her out and change out the reservoir... let her sit in plain, pH'd water with the air stone for a good couple of hours if not overnight... then you can add back in the nutes but I would go really gently - like 1/4 strength, give it a couple of days and then try another 1/4 strength addition... Good luck!

I am not a hydro man, but in soil it would be : STOP all feeding NOW, you have nitrogen toxicity, now its either playing with ph or just cut off absorbtion of calcium because of excess... In hydro most prob slow down on all nutes, retank her with lower strength, but i am not an amateur even here .. just theory ...