dificiency

Hello guys this is my first grow I am growing in coco and feeding half the recommended dose it is day 27. I suspect it is magnesium deficiency can anyone help me it would be much appreciated what do you guys think is the problem and what can I do to fix it I am very worried and scared I was due...

So first Pics are of a Critical Kush. Then a Zkittles and a GSC auto. They are all in a living soll that I was told wouldn't need any feeding.Critical is in veg and zkittles is. They are under mars hydro 1k and a blurp 1k I only have fed calmag so I'm not understanding how it seems I'm deficint...

Test

Anyone know what this might be appeared a few days back can provide more pics if needed, rest of the plant seems to be fine and growth doesn’t seem to be any slower. 400w mh Coco Canna a and b Ph 5.9 - temps 25c and 70% humidity

As an experienced grower, I'm curious to find out what other experienced growers are using nowadays and what is your best advice for newbies. What nutes do you use and why? include cost, why do you use them? Do you bubble your water if so.... how long and why? When do you PH how do you keep it...

As an experienced grower, I'm curious to find out what other people are using nowadays and what is most effective. Do you bubble your water if so how long and why? Is your water hard or soft? Do you use RO filter? What advice would you give to a new grower to help avoid problems?

I have been sifting through pictures on the internet and reading threads trying to figure out what is wrong with my leaves. I have been using Veg+Bloom for RO/Soft, with Botanicare Cal-Mag (Growing in Canna Coco medium). I am in about the 3rd week of veg and my plants were doing fine. I just...