Dumme
Well-Known Member
I would say, test your testing equipment.I find this interesting,cos my tap water is 481ppm, and when I add 3/4 strenght of AN nutes, my ppm goes waay above 2000pmm
plants dont show nute burn..
I would say, test your testing equipment.I find this interesting,cos my tap water is 481ppm, and when I add 3/4 strenght of AN nutes, my ppm goes waay above 2000pmm
plants dont show nute burn..
Its ftom the box calibratet... i have turbo high hard tap water..I would say, test your testing equipment.
Again, I would say test your equipment, as they sometimes come DOA and miss-calibrated.Its ftom the box calibratet... i have turbo high hard tap water..
Hey Santos , Its my understanding the .05 scale is used in North America with the .07 used in the Eu ?I use a Bluelab ppm Truncheon and it has all the different conversions on it: EC, CF, .5 ppm, and .7 ppm (Truncheon on the chart). Most people use the .7 conversion. It is the one on the left in the pic, was about ~$143 and worth every penny. It also has a five year warranty.
I start them around 440ppm, heavy veg them 900-1100. Transition nutes at 1100 PPM, I run my normal flowering plants about 1100 and my heavy feeders about 1400PPM hope this helps, good luck!I've been looking and looking but have not seen a reliable ppm chart for growing marijuana? I have heard people say use full strength, use half, use a quarter..I just want to know what you guys keep your ppm's at and when. If there is a nice chart somewhere out there that would be great too. Thanks!
Measure the height on your plants and check a day or two later and I'll bet they are growing fast and that's why the grow tips are yellow in the center. It can take a day or two for them to green up during rapid growth. That's a good thing and tells you they are happy.Hey Everyone!
I am using RO water, and it seems like my plants are yellowing from the center out. It is the top part of the plant, the new growth. I believe it is an Iron Deficiency. I add Cal-Mag Plus to my ro water, and use about 5 ml per gallon which makes it about 5-600 ppm. I just started an operation and am 6 weeks into vegging. I am using Growth Science organic line. 10ml each of grow, root magic, abundant-sea, and humic-tonic. The day after I gave them these nutes 2 of my plants started looking bad, now another is. While all the rest look great. So my question is, how do I correct this? Any pointers would be great.
I hope you're not testing pH of the RO water and making adjustments to it before adding your nutes and CalMag.This time I am using Reverse Osmosis water, which is throwing some serious wrench's in my gears cause I have to add Cal-Mag, and constantly adjust the PH.
Forgot to add, the plant can only use 83% of K20 - PotashI have been looking into nute levels etc over the last few days, and was given this link by another member on this forum, it talks about 'usable PPM's' rather than the ones you'll get from your actual reader.
For example, I am using the Botanicare KIND BLOOM, if I add 1ml to exactly 1 litre of RO water, my meter reads 332 uS/cm. However using the calculator in the link below, it suggests that there is only 246 uS/cm available to the plant. The reason being is that most liquid fertilizers use Phos P2 O5 - technically the plant only has access to 43.7% of what is on the label...
Another example..
KIND BLOOM
0.0% N
6.0% P
6.0% K
Actually translates to:
0.0% N
2.62% P
4.98% K
I have an extremely complicated spreadsheet, which I can share if anyone wants it. You'd just need to swap out the products and the analysis to tailor it for yourself. Can have up to 11 different products on it in its current form.
Link is here:
http://www.angelfire.com/cantina/fourtwenty/articles/profiles.htm
Annoyingly it keeps coming up with a Java pop up which I just close out, but it works pretty well.
Also a print screen of my PPMS based on 5 weeks of veg, 8 weeks of flower with a flush in the 9th week.
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