According to GH........add silica first, then calmag, then micro, then grow then bloom. Mixing in the wrong order or mixing the 3 part in it's concentrated form will result in nutrient lock out.
Are you saying you were mixing the micro, grow, and bloom together before you added them to the water?
If so, big mistake........read GH's mixing recommendations.
I use tap water and never have to add a calmag supplement.........but that's me.
Why don't you just hand feed all three plants? It's obvious the autopot plants aren't doing as well.
Coco works best in a drain to waste method.
I don't think either plants in the autopots look good.......just my opinion.
There's a reason the hand watering plant looks better.
When you say the EC is 1700......do you mean the ppm's are 1700 or the EC is actually 1.7?
Are you hand feeding the one in the front? Because it looks fine.
1700 run off is extreme........probably caused by not having any run off.......salt build up big time.
Consider hand feeding to substantial run off at least once a day and never use plain water........if you have to flush use a...
I find this whole thing difficult to follow........the posts are vague at best.
Why would you add epsom salt if you're already adding a calmag supplement?
The only reasons you would get root rot is lack of oxygen to the roots or the temp in the reservoir is too high.
I always feed/water with nutrients........never, ever plain water.
I start in solo cups and start feeding daily to run off around 3 days from sprout.
I transplant to 2 gallon pots after 2 weeks and start feeding twice a day.
Not sure why growing in coco is being made so complicated?
I just feed one nutrient from start to finish daily to run off with tap water, a pH around 6.0, and an EC around 1.0 and I never have a discolored leaf all the way to harvest. No supplements.
That's a problem........coco should be fed at least once a day to substantial run off. It should always be fully saturated........you don't wait for the plants to drink the water. Also, even though you didn't mention it...........never give plain water.
That wasn't mine.......I copied it from growweedeasy.com.
I've done a scrog only once........to much of a pain in the ass, plus you can't move the plants around. Lst and super cropping works just as well.