Why are these leaves browning?

Thanks for chatting with me in the dm's looking forward to the TDS results. Lets wait to see what they say and go from there. Cheers,

I don't really see anything wrong here? If there's a few rusty spots it's mist likely a mild calcium defeciency. The orange leaf tips is a slight over feed at some point (which is very common) some growers prefer to see this.... Light burn is a bit more obvious, and you would see it in and around the highest points of the plant only at first,

Let me know if you need any more help with this, you can use the DM feature. Your inbox is the little green arrow at the bottom right of the screen. Cheers,

I’m using autopots but the ph going in is 6.3 and the ph in the tray is 6.1, not sure if the EC value. I think the issue is that my recirculating fan deposits about two feet in front of the fan blowing on the plants so those plants weren’t getting enough c02. I moved it right behind the other fan so hopefully that helps!

Looks to be a bit of light burn to me. but I also see more tip burn below the highest set of leaves. that's points me to think its an over feeding issues with just this plant. Are you monitoring your EC and runoff? Best Of Luck and Happy Growing.

I’ve got C02 at 1500 ppm

With PPFD on 1100 1300 you need to add CO2 Without CO2 PPFD on 900 Is safe zone, PPFD 1000 is higher range Too much photons Is not always the best choice Have a good one buddy!