Wow, look at this nice journal :
It must be @Mark0427’s journal!
I’ll keep watching it then…
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What kind of issues are you having with the Jack’s…?
What media do you grow in…?
Just curious…
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I think the issue is he be too coo for Jacks.
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I have ffof mixed woth cocoloco. All the leaves on my photo plants seem to turn yellowish not sure i cant pick out a deficiency to save my life but ive never had these issues with gh
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All the leaves seem to be a slight yellowish color working from center of leaf to the tips. Ive only used a lil calmag with rp water a touch of tribus and a touch of molasses. When i did jacks woth nothing else i just mixed the jacks strait. Did 4 gal worth of jacks in 5 gal of water
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What’s your runoff ? I’m probably wrong but Isnt ffof considered a “hot” soil where it has nutes in it. Have they been depleted before started using Jack’s ?
Show the class some pics please 
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Your not wrong ffof and coco loco are hot.
I would also not be feeding until run off indicated so. Thus I agree with @Joshmcginnis28 as I’m curious to know the tds PH in and out.
@Bulldognuts uses Jack’s with coco loco and ffof with great success, maybe he can post a link to his latest journal and you can get a feel for it through his experience.
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Here, don’t tell him I said so, but I also learn a lot by reading @Bulldognuts’s journals! 
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Epic adventure right there.
Although you may want to hit summerize on the first post right below in blue. It’s a big one otherwise
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I follow along with bulldog too but ive had no problems with using the gh nutes at all really. It is bigger photo plants and ive only used jacks once mixed 3 gal to 5 gal of water was real loght that sedmed to be the only time i water they dont turn yellowish when i water i use ro water and i do add calmag to the water per what it calls for thats all i use beside trying calmag tribus a touch and a touch of molasses last water and get the yellowing again
@Nicky this is the plant she is the biggest one i have or he not sure yet. This is the plant to the far left back side
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Signs of PH issues By those leafs.
Also dud you read run off prior to feed? Why did you decide to feed?
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I feel like switching to jacks from something else midgrow is hard on the media… i had some wild ph swings when I first introduced Jacks… I think im finally started to get everything smoothed out nute wise… idk.
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I would rinse the medium, and verify ph.
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Yup. Agreed
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I decided to do a feed to see if it changed things. It did but i dont want to have to keep feeding. Maybe i need to get a new ph meter now. Idk. Gonna look at new ph meter and see if thats the issue. Maybe try and cal this one again and see
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Unless your PH pens is from apera or blue labs it may not be accurate.
Although if it’s one you can calibrate you should be able to calibrate it successfully, if it is a cheap one with no calibration fluid it’s probably not accurate.
I tried a couple cheap ones they don’t work right. Tds pens do though
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Sweet man
That looks like you are getting ph fluctuations.
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