leaf tips burned / spotting – need help please

 
 

These Bubba clones just finished their second week of Veg since I received them. I’m running a flood & drain system with a 20 gal rez using the Fox Farm Hydro stuff in Coco. Temps have been 77 – 80 with lights on & 69 – 71 with lights off, humidity between 50 -60%. Ph has been around 6.0

Started noticing the burn on the tips middle of last week, with the spotting showing up in the last day or so. I changed the rez last night and went a little light on the nutes thinking I had maybe somehow overdone it previously. Also, I topped them last weekend, but I don’t think that would be an issue?

Any guidance would be greatly appreciated :thanks:


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