From what ive experianced these two go hand in hand... so it sounds like your on the right track. That Zyme will help too if thats the problem. If your ppm's are swinging too it might be needing more/less ppm's too. That can make the pH do funky stuff too. If your seeing clear edges on your roots... your seeing rot. GL with everything man... tagging along. :smoke:
Just went back and looked closer at that root shot. and the one off to the left is showing perfect signs of the stuff. The whole thing should be just like the thicker part. That thin stuff is the rot.
you dismissed this the first time... maybe now you will take it seriously.
A slight yellowing of the roots is normal with alot of different nutrients. The biggest thing you need to look for in the roots is a sliminess. And they should be kinda firm, and bouncy when you move them a little.
I noticed on a post on the last page you said something about leaves drooping... and then getting necrotic. and you said "but there is no reason for it". Um, i promise that something is making them do it... and its not just a freak thing. If the conditions are not right... plants show sign of stress. its that simple. Plants that have no reason to wilt, burn, droop... dont do it.
So i will say it again... If the same strand of root is two different sizes, colors, texture... your looking at some sort of root problem. The symptoms, the pics of the roots, are all tellng me that this is the problem. It is possible to have some healthy looking roots... and positive growth even with a rootzone problem. and i think this is whats got you shaking your head.
To fix this what i would do is empty the bucket, and fill with a water/zyme or water/peroxide solution only. When i do this i use Gold Zone and water. But dont just fill up the bucket and put the lid back on. put the plant on the empty bucket.and fill through the hydroton. put the whole 3-4 gallons through that way... drain the bucket again, and refill with 1/2 strength nutes for a couple days... then bump it if all is going well.
I hope all gets under control. I have had my share of the pH swings... and its always a root problem.