is this a mag def?

I know there are is a TON of info about this but its slight and all my plants look like this 1 is in 70/30 coco pelite hempy with perlite up to res, another is 40/60 coco perlite and the other all perlite i started feeding with sensi ab now i switched to maxibloom only k.i.s.s. method my tap is 140 ppm i let it bubble for 36 hrs and i add calmag. The yellowing between the veins is still on all except the one in 40/60 coco perlite any help would be great 3 week old bubblegummer also they look small for there age oh i also tried to leave out calmag last watering thinking i had too much

You just need to up your nute strength a little. That is what the Lime Green new growth is telling me. And continue to use the CalMag,, I can never seem to get away without it, although I have been running some plants lately with just the GH 3 Part Bottle formula (not full strength), and have not needed the CalMag yet. Other than that, she looks strong and healthy.

Oh and if you think she is growing slowly, you can water more often.
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Sorry,, I needed to edit my post.. I see that your tap is already 140PPM,, That being the case, you really should not need any additional CalMag. If you do, it will be just a small amount. I am using RO Water, so I use it constantly.

View attachment 23Hey thanks for the response! im at 600 ppm now and im gona switch to ro maybe my tap is causing it? Its kinda hard to tell frm pics but ill water more often. Ive got 6 or 7 weeks to veg still, till my auto blueberry is done just wanted to stay on top of any probs still a newb! Heres a couple more pics and some of my auto its 4 weeks into flower and the buds are frosty but SO TINY!! all plants are under 750 watt MH and a 26 watt uvb. Im feeding them sensi AB, bigbud and budfactor x ph 6.2 do you think theyll fatten up? I sure hope so

The Auto still has another 4 weeks or so to go, it will more than likely plump up during this time. Is the Auto on an 18/6 Light Schedule?

I am currently finishing up an Auto Northern Light Blue, and she has done quite well for a plant that has been in the veg tent under CFLs.

Also, float your PH Around a bit. I find that 6.2 is actually the Top of the Line.. I like to mix one feed a 5.8, then next time at 6.0, then next time at 5.9, etc.. and actually have not gone much into the 6.2 range at all.

I used the AN's PH Perfect line when I was running hydro, and they make good nutes,, Just a little pricey

Yep 18/6 thanks for the advice+ rep its kinda frustrating cuz my plants seem to grow so slow no matter what i do! i think next im gona try the waterfarm i got i just wanted an easy growing method for my first time hempy seemed the way to go. I was gona go soil but i have no hydro shops even kinda close and shipping for soil is crazy!!

If they are growing slow, then your doing something wrong. My Hempy's are growing faster than I can keep up. In fact I have been trying to hold off on watering as long as I could on a couple, just to try and get them to slow down. If you feed every day, they will grow faster. When I did my first transplant into my 3 Gallon Buckets, I did not water them daily, but every 2 days cause I was thinking like a dirt grower and afraid I was going to over water. It ended up taking them 2 weeks to hit the res and take off.

The next time I transplanted, I watered every day to ever other day, and roots hit in less than a week. So what I am seeing is Water more often for faster growth.

Oh I am also running just 100% Perlite as well as 3-1 Perlite, Vermiculite mix

Good luck!!

Ok ill start watering everyday thanks for all the help!!