I remember your earlier question about General Hydroponics / Terra Aquatica, and from your setup it really looks like a DWC system with just a thin layer of hydroton on top. This doesn’t look like nutrient burn — it’s more like a nitrogen deficiency. The pale color and the lower leaves yellowing upward are classic signs of low N in hydro. For DWC, the ideal pH is 5.8. I’d lower your pH to about 5.8 and keep it in the 5.5–6.0 range. That’s the sweet spot for nitrogen, CalMag and micronutrient uptake. Your EC also seems a bit low for Terra Aquatica in veg. A good range in DWC is EC 1.2–1.6 depending on the strain. Slightly increasing your base nutrients or adding a small amount of extra nitrogen (like a mono-N product) should fix the deficiency quickly. Your problem might even fix if you go by the standart scedule given bei General Hydroponics. By carefully the bottles shows a scedule for Terra/Coco and one for Hydro. Don't switch it up... =) And for your former Question on General Hydroponics..... on the European markets they go by the Name Terra Aquatica. Same product/producer, diffrent name. But you'll finde Terra Aquatica in the list. 😉

In the picture, I see that the plant is in clay balls (expanded clay) and shows clear signs of severe nutrient deficiency. This is not nutrient burn, but definitely a deficiency. The problem: In week 2, the plant has hardly any reserves and urgently needs nutrients. The yellow, drooping leaves indicate a nitrogen deficiency. With hydro/expanded clay, you need to fertilize from the start, as the medium does not store nutrients. My recommendation: - Start immediately with a light nutrient solution (about EC 0.8-1.0 for this stage) - Adjust pH to 5.8-6.0 (you have 6.0, that's okay) - The plant will recover quickly once it gets nutrients In hydro, never fertilize "cautiously" - the plant has nothing otherwise! 💚

Are they completely in these pebbles?? But that's a deficiency in the final stage. There's a lack of basic nutrients.