Nutrients

Marlo95

Marlo95

Active Member
Hello everyone, I'm on my first ever DWC grow and I absolutely love it! I use general hydroponics nutrients and it works pretty well. My main question is basically. How do I know where my ppm should be? I recently have an incident with one of my plants that made the lower leaves turn yellow and a couple died because I wasn't feeding them enough. Since I use general hydroponics I use a chart that tells me when and how much to feed but the chart tells me to use more than I should because they want buyers to use more product even if the plant doesn't need it. I know all about ppm and ph but I don't know about EC. what is EC? What's the purpose? And how do I know how many ppm to add?
 
A

az2000

Well-Known Member
Marlo95 said:
Did you use every product on the schedule?
Click to expand...
I only followed the weekly schedule and cut my nutes in half when using a bloom booster (GH KoolBloom dry) as described in "week 5."

Beyond that I used Botanicare Liquid Karma, CalMag+ and Silica Blast. Also GH Koolbloom liquid in early to mid flower (without reducing the nutes). Molassess in bloom.

I liked the results. I switched to a dry organic'ish nutrient because it's much less expensive. But, GH Flora has ph buffers which held my soilless medium's ph more stable than I'm experiencing now.
 
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churchhaze

Well-Known Member
EC is electric concentration, and 1.0-1.4 is good for all stages of DWC. You could try pushing 2.0 to see how your plants react, but if you go too high, your leaves will get hard.

ppm meters are actually just EC meters with a conversion factor, which you can find charts online. This means that ppm can mean something totally different depending on what conversion factor is. For that reason, I don't like to give ppm suggestions. You should use the chart to convert 1.4 to ppm for your conversion factor.



Marlo95 said:
Hello everyone, I'm on my first ever DWC grow and I absolutely love it! I use general hydroponics nutrients and it works pretty well. My main question is basically. How do I know where my ppm should be? I recently have an incident with one of my plants that made the lower leaves turn yellow and a couple died because I wasn't feeding them enough. Since I use general hydroponics I use a chart that tells me when and how much to feed but the chart tells me to use more than I should because they want buyers to use more product even if the plant doesn't need it. I know all about ppm and ph but I don't know about EC. what is EC? What's the purpose? And how do I know how many ppm to add?
Click to expand...
 
Marlo95

Marlo95

Active Member
churchhaze said:
EC is electric concentration, and 1.0-1.4 is good for all stages of DWC. You could try pushing 2.0 to see how your plants react, but if you go too high, your leaves will get hard.

ppm meters are actually just EC meters with a conversion factor, which you can find charts online. This means that ppm can mean something totally different depending on what conversion factor is. For that reason, I don't like to give ppm suggestions. You should use the chart to convert 1.4 to ppm for your conversion factor.

Click to expand...
Thank you very much. Ec makes slit more sense to me now
 
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