Can’t get this to stop

This is my first grow. I’ve been hitting this with ml of calmag per gallon and can’t stop this. Is this a calcium deficiency?

What medium are you in what are you feeding how much? What is your ph. I'm not a 100% sure so get more opinions I think it needs potassium.

Bose said:

What medium are you in what are you feeding how much? What is your ph. I'm not a 100% sure so get more opinions I think it needs potassium.

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Using coco perlite mix. RO water with calmag added. Ph 5.8, 1600 EC GH flora series. Added kool, floralucious plus, rapid start. Temps 77 light, 71 dark. Rh 50 - 58.

Billy Bob Snortin said:

This is my first grow. I’ve been hitting this with ml of calmag per gallon and can’t stop this. Is this a calcium deficiency?

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How much CalMag are you adding? The bottle I have says to use 3-5 ml \ gallon. Also, I see lots of posts calling for up to 6.2 ph in flower when using coco.

Gobi said:

How much CalMag are you adding? The bottle I have says to use 3-5 ml \ gallon. Also, I see lots of posts calling for up to 6.2 ph in flower when using coco.

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I’m put 5ml per gallon.

Billy Bob Snortin said:

I’m put 5ml per gallon.

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From what I read ph is the only other thing I can think of. Does it appear on the newer growth, or just the older leaves? I'm just hitting the end of my first grow, so take what I say with a grain of salt.

that’s called lockout not a deficiency. I would completely flush the soil and try using non ro water and no cal at unless your tap water is horrendously dirty. But giving it more will only make it worsen. You have a lot locked out not just calcium. P for sure isn’t synthesizing right which is causing other problems with uptake.