It is most likely a lil nute burn. But we either need closer pics and/or your PPM reading to gauge nute strength. I'm not very well versed in hydro and am not gonna pretend to be in this post. Just letting you know what some of the hydro experts here may ask you for when attempting to diagnose your brown spots. Good Luck.
ProGroWannabe Reviewed by ProGroWannabe on . need help with drip system things dont look right but im not sure because this is my first time. please help out and any input would be appriciated. heres some pics of equitment, nutrients and trees. Theres 8 plants all started different times but the 1st 2 are feminized great white shark 3 through 8 are unknown orgin and not feminized. hope to get atleast 3 females out of the 6 unknown. i have them on a 16 hrs light and 7 hrs dark. try to do my best at keeping them at a 5.5 to 6.0 ph level but i dont have the best Rating: 5