First DWC Attempt - AK-47 Auto

No chance for deficiency, I give just water until she is twice that size. it's either nutrient burn or the beginning of root rot.

Essig und Zitronensaft bleiben nicht lange stabil ! Der Ph steigt nach kurzer Zeit wieder an !

Smell/Feel Them! Rotten roots smell bad Feel slimy and soft. Healthy roots smell not bad Feel plump and solid.

hey there misanthrope, this is just your average nutrient burn you can tell by the burn on the tips. You have me worried about how you're talking about having 2.5 weeks left yet starting to flush soon. In hydro you wont need more than a day of plain water for a flush - that's kind of the point of hydro actually. Anyways, not a deficiency, try to reduce the nutrients by 0.5 or a bit less mL/L then work your way back up week on week . Hope this helps ! 🚀

Yes that's a bacterial infection. Its going to be a battle. Im assuming your in a DWC and not a RDWC. Directly spray the roots with a 3% mixture once every 2-3 days and do a bucket change. Every day add 2ml/L of h202 @3% to the bucket. Keep your usual feeding since your using synthetic nutrients which can be used in a sterile environment If you can add more air stones the more air the better. Keep the air pumps outside your tent( or even in a fridge ) to keep water temps down. If you can keep the water temp at 65F and never let it get above 70F( or below 63F). Use frozen water bottles and have your bucket sit in a larger tote with water in it and keep that water at the correct temp which will keep your bucket water correct. Get some white paper and place on the bucket top to block light from hitting the black bucket and heating it up. If you have access to hydro guard that can help, But its organic so it will be killed by H202. Good luck and Happy Growing