What do you guys think?

Too much water Also try dialing in your PH. If u using supersoil you just need to add correct ph'ed water wit some Epsom Salt 150ppm added 2 tap.. (can also be used as a foilar sprayL

Burnt tips and edges on leaves can often indicate nutrient burn or toxicity. This could be caused by overfeeding or incorrect nutrient ratios in your feeding regimen. However, if you're using a super soil medium, nutrient burn is less likely unless you've added additional nutrients that the soil couldn't handle. Dark-brown discoloration on the leaves could be a sign of various issues, including nutrient deficiencies, nutrient lockout, or even pest or disease issues. Without more specific details about the appearance and distribution of the discoloration, it's hard to determine the exact cause. The brown rust-like patches on one leaf could potentially be a sign of a fungal infection like septoria. Septoria typically presents as small, circular brown spots with a lighter center and can spread rapidly if not addressed promptly. Considering your setup and symptoms, it's possible that you might be dealing with a calcium or magnesium deficiency, which could lead to burnt tips and edges and discoloration. However, without a closer examination or additional information about your feeding schedule and water pH, it's challenging to confirm. I'd recommend closely inspecting your plants for any signs of pests or diseases, checking the pH of your water and soil, and adjusting your feeding regimen if necessary. If the issue persists or worsens, you may need to consult with experienced growers or a plant health specialist to identify and address the problem accurately.

Not Sephora, it usually starts more on the inner parts of the leaves not the tips or edges. I think you’re a little low in Mg. Add about 25% more in your next two waterings and see if she pulls though it and you don’t see any more development of the spots. Also, make sure you are watering enough to have roughly 10-20% run off out the bottom. This will help with any build ups in Nitrogen you may be starting to see in the burnt tips. Hope this helps.

100% NOT septoria...........which is almost impossible to get. Pics 1, 2 & 3 show nitrogen toxicity. Pic 4 looks like a developing magnesium deficiency.

Para saber cuando hay que regar, solo vasta con levantar la maseta, si esta pesada quiere decir que todavía no es tiempo de regar.Al pasar de los días esto se convierte en una técnica vastante útil. Cuando sea el momento de regar, mida la cantidad de agua hasta obtener el 10 % de escorrentía. Esto evita la acumulación de sales en el sustrato. Recuerde que la planta también necesita días secos. Por lo tanto puede regar día por medio o 3 veses por semana. No es deficiencia de calcio. También puedo agregar ,que si la temperatura del agua de riego es de 30⁰ como leo en su diario. Intente bajarla a 21⁰ por que un agua de riego con temperatura elevada causa problemas.

i would say its to early in her development to be calmag deficiency. in my opinnion it looks more like early stages of overwatering. According to your diary you are watering her 1l daily (7L weekly). in my oppinion this is WAY to much. you are drowning your ladies... 😭😱💀 At week 3 im not watering much more than 1L/plant the entire week. I usually start watering twice a week at week 3 which make it 0.5l each watering.

it's not a calcium issue so septoria or some other issue is at play mate 👍