Hello everyone my girls are dropping there vibrant green to a ugly yellow this has been happening over the past couple days ppm is about 350 or .6 EC the ph goes from 5.7 to 6.1 depending on the time of day seems like any help would be greatly appreciated thanks
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This is 2 different plants but both are in the same rdwc setup
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How big is the reservoir and what nutrients are you running 
Check out this chart and see which one would best fit your situation.
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The res is 10 gallons it’s a 4 plant rdwc system I’m running the cronk nutrients line up and also there same brand of cal mag I may try lowering the ec some and see if it gets better or worse
How long since a fresh res change?
The ph is good the ppm at just 300 shouldn’t be to high, if anything maybe a little low if they are getting alot of light.
My experience more with drain to waist and autopots though, rdwc can be a completely different beast.
For me if I can’t pin point what the issue is then i just go for a fresh start with full reservoir change.
That’s why i ask how big, if it was huge its not always easy to just dump it and start over.
Someone else with more actual rdwc experience may be of more help but that’s my 2 cents 
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It’s been about 5 days since I did a complete water change to bump up the nutrients a little I forgot to mention I also use RO water and I greatly appreciate the help I’m definitely going to look at that chart more closely when I get off work
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What about any kind of root inoculant (microbes),
Any of those in the mix?
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Bump your EC up to 1.6-1.8 Growmie. PH is good, what’s the temps of the nutrient solution in the buckets and what’s the air gap between the net cup and nutrient solution 
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I use orca and hydro guard in the mixy water temps do not get above 66 I have a chiller running into res the air gap is about 2 to 3 inches from the bottom of the net pot I was just afraid to raise the ec to much with it being autos but when I get home I’m gonna do another test change and raise it up
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They grow at the same speed as photos they should use similar feed strengths.
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Too low for mature plants. You should be providing complete base nutrient program at 800-1000ppm for mature plants generally.
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Thanks everyone for the feed back hopefully I can get these girls healthy again
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