You will be fine, I use pro mix too usually. That's the optimal range for pro mix, so that will give best over all absorption of nutrients. I use R/O water which has none so I need to add calmag. Also if you're using coco it will need added calmag. I heard that cob led lights will also require more calmag as well, but not sure if that's true. If your ph is correct and you dont over or under do it on calmag your good. A lot of deficiencies or toxicities are from incorrect ph. When your ph is off you can have lockout. That's when things go bad, so chech your ph. Also be careful Potassium deficiency can be confused with calmag. I use 2.0g of Greenleaf calmag per gal of water.I did end up adding some soil up to brace the stem. It’s getting pretty stiff now so I’m not worried. Though it’s getting to the point where I won’t be able to fold over for LST. Might still consider topping...we’ll see.
Also, I’ve got the lights almost to the top, I’ll bring em up the last bit though. We’ll see how tall these ones get.
Thanks for stopping by and I’ll ask more questions as I go I’m sure!
Cool, thanks. I’ve got a decent ph meter and check all my water and feed going in. I wondered though, Cal/mag usually is uptaken at higher pH in soils. Is going this low an issue for uptake for Promix?
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