Hello, It has been 6 days since I dosed with Epsom salts and water that was 7.0 PH. They were looking pretty good for a couple of days. This morning the worst one is looking very yellow and the others looking like the leaves are getting lighter. The first picture is the worst one. The second picture represents the other three plants. Any thoughts on how I can save these plants?
Thanks,
Larry
I wanna say its turning yellow because you flushed out all nutrients and toxins now you can feed them with half the dose they were getting at first so they can ease the nutrients back In the plants canopy and foliage, start with a light feeding, and make sure she gets the N-P-K, calcium, and magnesium and all other nutrients at same time to prevent a lock out, and try to get your soil ph to 6.3-6.8
Majiktoker, thank you for the quick reply. I will water with nutrients as soon as the lights come on this evening. Since the initial problem was magnesium should I also add more epsom salts?
Larry
No just start with the N-P-K, and calcium and magnesium, if you add more Epsom salt your just gunna cancel out the food your trying to start her back up on, make sence lol 
Promix actually is soil-less and a pH of 6.5-7.0 is way too high, even 6.3-6.8 might be too high for promix, the company themselves recommends 5.8 pH as it is a soil-less media.
~MacG
Thanks MacG, did I go about answering this right
Yikes I am using K-9 Blend Growers Mix. I have been watering with 6.8 water as wellâŚshould I be down to 5.8 as well?
@taleone, I donât know what k-9 blend is made of, if it is only peat and perlite without any soil like amendments, then probably, and you might need to supplement it with a cal-mag regularly.
This is what is recommended for pro-mix.
âThe optimum soilless medium pH for nutrient uptake is between 5.5 and 6.0.â
~MacG
For using only peat and perlite, what should my ph be at? Curious
5.5-5.8 if Iâm not mistaken
I just answered that above, at 5.8 with a range of 5.5-6.0 according to promix.
~MacG
Thanks for the info, I was not aware of that.
I have been watering at 7.0 PH. My run off is always around 6.0. Should I continue watering at 7 since the run off is much lower?
Larry
6.0 is at the high end, you might want to try watering with 6.0-6.5 to get a run off at about 5.5-5.8.
~MacG
Take a look at this chart, soil-less like a peat and perlite mix will use the hydro scale.
In the chart you can see how a pH too high will make many of the nutrients harder for the plant to absorb and use.
At 6.0 and above you will likely already be having calcium deficiencies, you start to lose (K)potasium, and much higher and you start to lose phosphorus and then you lose nitrogen.
~MacG
That graph explains it all. Now what should I do? Iâm at 4 weeks 5 days flowering and the leaves on the plants are turning yellow. (one more than the other three). I watered yesterday with flowering nutrients in 7.0 water. All plants look good except for the yellowing.
Thank You,
Larry
Flush your soil with correctly phâd water use 3 times volume of the pot run rinse it right through check ph of run off periodically during rinse stop flush once closer to goal and feed. your plants not effected yet will recover the one in picture may get some green back?
Most of the nutrients to recover will still be present in the soil but a flush rinses many of them out so feed light if you have cal-mag add likewise some Liquid Karma or kelp based nutes would speed recovery improving the odds it wonât drastically effect yields or hermie the pictured plant 
and sooner is better than later
http://foxfarmfertilizer.com/index.php/item/lucky-dog-k-9-kube.html says it contains Peat, Perlite, earthworm castings, Bat guanoâŚIt doesnât say anything about whether it is Soiless or whatâŚI am still confused
Peat moss and coco coir, are pretty much the same as growing in hydro, peat moss and coco coir are soilless
Whats your problem, why are you still watering with 7.0 water. You shouldnât have to flush very time you turn around. P H your water at 5.5. 6.0 and just water your plants and I always added more water for each and then checked your ph when it gets back to normal then you could start back on your feed schedule.
Well maybe not,âŚI got to go right now and me some meds.
Im not done there is something else but for nowâŚi got to go
Will
