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I am starting out with DWC in my first grow. I have just bought a ph and TDS meter and am at week 3.

 

My Cyco nutrient chart says I should be at 1300 ppm at this point and ph 5.5.

 

Ph was easy enough. Ppm started at 200 plain water and 580 with recommended nutrient levels. I added about 1/3 nutrient again and it went to 670.

 

I don't really want to push it any further than that, ideas? Am I doing something wrong?

 

Thanks in advance

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Fuck no at week three 670 is heaps! I'd even say watch for any yellowing tips on ya leaves. How many nodes you got after 3 weeks? Any pictures? If it's small I'd even flush and do again with only 400-500ppm max

 

Might be lucky and it could thrive off it but 3 weeks old I'm guessing probably a bit too small

Edited by Tunkers
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Thanks, just what I thought, I was driven by their figures though.

 

It is on its 4th node, but grown very squat so still only 6-8 inches high.

 

I will flush out for a ppm of 400, thanks tunkers.

Pics in my grow diary, sorry have deleted them from my iPad so can't repost ATM.

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Think I will just take notes, watch the results and forget cyco's guide.

 

I found this on another forum and will stick in this general guideline.

 

Seedlings, Early Sprouts 100 to 250

 

Early Vegging 300 to 400

 

Full Vegetation 450 to 700

 

Early Blooming 750 to 950

 

Full Mature Blooms 1000 to 1600

Edited by PurpleADL
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Forget the ppm crap, go to Ec then there is never any confusion..............  ppm is an american thing and very confusing as there are different ppm's

The conversion chart is easy to use.. The old yellow truncheon i have is PPM and it one of the best and most reliable and its 20 years old. 

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Guides can be a good starting point for new growers, but what is needed is to learn to read your plants for signs of over or under feeding, and then adjust nutrient strength accordingly.  That's when an EC or PPM meter comes in handy, as it allows you to accurately measure the strength of the feed to match what you know the plants need, and that leads to much happier plants that perform better.  At that point, PPM or EC,  doesn't matter which as you know what number you are looking for, it's only the reliability of your meter you need to worry about.

 

Ignore manufacturer directions as they are usually way too strong, start low strength and steadily build it up, and as soon as you see signs of nute burn on the leaf tips you know it's too strong, so back it off a bit.  Learn to predict the stages that the plants need more or less food, and combine it with this sort of approach, and even an idiot like me can do alright.

 

:peace:

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