I added some cal mag not a ton just trying to let them sip now, also PH was low 5.5 ish so I brought that back to 5.8 ish and I increased my air movement I added a fan and I am leaving cabinet partially open RH at 47%. TDS right around 1k. Are the flower nutes more acidic? This is my first major swing in PH?
Greetings, if you are referring to the pH swinging, that is s a combination of bio activity, D-Oxygen, buffer agents. It will swing daily and most times it down. You just need to learn what your setup does, you can control pH swing's with air bubbles.
Mine swings up but I still check daily when running a res, if I want a strict range. If not I let it swing between 5.8-6.2.
Furthermore ca:mg is the most common def in Cannabis growing in water and Coco.
Coco has issues with P loading as well. Hydro doesn't. Hydroguard is your friend too.
Also r/h in veg can be 70's with out issue as long as air movement and ventilation is adequate. In flower is when you want 45-53%
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