Currently 25 days in and need a lil help... PPM- 749 Tap water - 166 Water temp- 75 F Air Temp - 82 on 73 F off Humidity - averages 50% Nutes- Half strength advance grow, micro, bloom, b-52, voodoo juice, FULL strength cal mag and hydroguard. Recirculating Drip System... PH -- 6.5 Lights --- LEDs and CFLs Growing Medium- Hydroton One of my plants as stunted growth and rust spots... Originally I was not using any Cal Mag but have added it in but after a week I am seeing little improvement. I am also using a foilage spray of cal mag and phd water. Should I add more Cal- Mag or am I experiencing another issue? I have attached pics of the healthy and not so healthly plants.
That looks like heat stress to me I would invest in some kelp or seaweed to give it a feeding to deal with it feel free to check out my journal when you have time https://forum.grasscity.com/index.php?threads/1435037/ Sent from my SM-G930P using Tapatalk
Also looks like toxicity which means there is too many elements in your soil. What's your feed schedule and nutes