I would calibrate yes. You are at the very bottom of “within range”. Submit a ticket also and have the team have a look at the system in their end.
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@SWSVIC I just calibrated my ph probe. Are there instructions on how to calibrate the ec pen? Thanks.
No, currently Grobo does not offer EC/PPM calibration.
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@Aangdid u buy a EC pen from blue labs too? Same process for calibration but different liquids to use
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Believe @Aang was looking for instructions on calibrating the Grobo EC pen. Aang, if you’re question was in reference to your BlueLabs EC/PPM meter, the instructions for that are on the hang tag that came attached to it.
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Thanks guys @SWSVIC @Jamminbear.
Yes I do have the Bluelab EC pen.
Is there a way to calibrate or find out what the EC reading is for the Grobo EC pen?
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Unfortunately no, you can however submit a support ticket and have the Grobo Team look into it if you feel there is an issue. I always check the EC and PPM of the water coming out. I have found that my PPM is quite high and am currently working on getting it down. (I attribute it to using Recharge in my solution, I have since discontinued its use).
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@SWSVIC what ppm is coming out and are u measuring the 500 or 700 standard.
@Aang if u have the blue lab Ec meter…just calibrate yourself and take reading periodically. You can inform the support team at Grobo if your Rez EC is running high and prevent issues before u see it on the leaves. EC can range from 1-2 and anything higher , I would keep a closer eye on. The most important thing is how your plants looks
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Hey @Long I’m using PPM700, last reading I took (last Friday) was 1690. EC was at 2.4. Plant is happy, has been living in these conditions essentially it’s entire life (since the beginning of Late Veg.). 
If she is digging it- that is the best part. How dark are leaves btw, are they normal color or super dark green?
Lights are off currently, this close up is from Friday just before she switched to transition. Appears “normal” in color with new growth being light.
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Looks good to me… nice trellis too! What u got growing?
GDP, this is my first grow (ever), opted to go with something that was tried and true and had a “solid” Grobo recipe. I knew next to nothing about growing or genetics when I chose. I have some very special gear lined up for the future. Next grow will be Frosted Cherry Cookies (Fem) from Relentless. Followed by some Bloom genetics, and then some Horchatas from Wyeast. Check out my thread here:
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Update: Grobo pH probe is reading around 6.0-6.2. Will monitor the new leaves for brown spots.
I’m on day 22, Early Vegetation (day 12/14). This is what the recipe schedule looks like:
From what I’ve read, people generally do not extend Early Vegetation and they go straight to Late Vegetation and extend from there if needed.
My plant is still tiny, do you guys think I should extend her for another week at least?
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Leave her be but maybe push the pod down a mm.
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Will do. Thanks!
She is looking rough right now…don’t know if extending right now or wait til next phase but imo might as well wait…you can still always change schedule after in late veg
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If its your first grow id leave the schedule alone.
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Hey Todd, you don’t think the increased nutrient dosage of Late Veg may cause harm to the plant?
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