Dyna-Gro EC and PPM Issue?

@homebrewer I'm using the Dyna-gro nutrient system and my PPMs and EC levels are way too high.

My medium is Mother Earth Coco + Perlite. I'm following the Dyna Grow Feeding Chart (attached) drain to waste using RO with Foliage-Pro (inplace of Grow), but when I do a gallon up (for example Week 4 Veg) my PPMs are 1250+ and my EC is 2.5. Here are my exact measurements per gallon:

Week 4
Foliage-Pro: 2.5ml
Pro-Tekt: 5ml
Mag-Pro: 1.0ml

The attached chart says I should be at <390ppm while the second chart says I should be at <750ppm...What am I doing wrong? Thanks in advance!

Mazey Farms said:

@homebrewer I'm using the Dyna-gro nutrient system and my PPMs and EC levels are way too high.

My medium is Mother Earth Coco + Perlite. I'm following the Dyna Grow Feeding Chart (attached) drain to waste using RO with Foliage-Pro (inplace of Grow), but when I do a gallon up (for example Week 4 Veg) my PPMs are 1250+ and my EC is 2.5. Here are my exact measurements per gallon:

Week 4
Foliage-Pro: 2.5ml
Pro-Tekt: 5ml
Mag-Pro: 1.0ml

The attached chart says I should be at <390ppm while the second chart says I should be at <750ppm...What am I doing wrong? Thanks in advance!

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Something isn't right as that dosage should not equal 2.5 EC. I'm assuming your RO water is coming out lose to zero ppm?

@homebrewer thank you for the response. I redid the reservoir this AM and was able to get my EC = 0.8 and my PPMs to 410. So I guess I'll chalk this one up to "user error."

My question now is a PPM of 410 and an EC of 0.8 too low for week four of veg?

@Dyna-Gro Staff

Nope, you're fine. You could run even those levels all the way through flower and be totally fine.

homebrewer said:

Nope, you're fine. You could run even those levels all the way through flower and be totally fine.

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Thanks for the piece of mind @homebrewer.

homebrewer said:

Nope, you're fine. You could run even those levels all the way through flower and be totally fine.

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You don't think that a tsp of Pro-teKt is too much? Weren't you down to .5ml per gal these days?

Theophilus said:

You don't think that a tsp of Pro-teKt is too much? Weren't you down to .5ml per gal these days?

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I suppose I missed that. I do think 5mls/gal of protekt is unnecessary.

Yeah...Just .5ml per gal of ProTekt is enough for my plants.

Something else to be aware of is that there are 2 different "scales" for measuring PPM. There's the 500 scale and the 700 scale. I'm not sure what meter you're using but make sure you're on the right scale.

GOLDBERG71 said:

Something else to be aware of is that there are 2 different "scales" for measuring PPM. There's the 500 scale and the 700 scale. I'm not sure what meter you're using but make sure you're on the right scale.

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That's why I recommend getting a meter that reads in EC. Makes everything less confusing.

Theophilus said:

That's why I recommend getting a meter that reads in EC. Makes everything less confusing.

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To each his own keeping your meter on the right scale should be easy. I prefer seeing a number I can relate to. I'm good with math so parts per million makes perfect sense to me. I have no idea how to relate to EC. I understand the concept perfectly. But especially when I'm reducing nutes PPM comes in handy reducing each part mathematically.