Oivay buddy... Those roots are dog Shit
I had similar issues. I soaked my plants in ~5-10% for 20-30 minutes at a time, then rinsing under warm water, then dunking back in the H2O2. I did this for days before they finally recovered. My problem steamed from the starter cubes being too wet, so I made sure to soak the plants up into the starter cubes. Here's before and after pics
I can definitely believe it...
quick question, what size tote is that? 17gallon or 27? and also how many plants u got in each tote?
Yes like others said, thats defiantly bad. follow the h2o2 people advised and it should bounce back. Also i use h2o2 in both my RDWC setups religiously, every 3 to 4 days i give about 1 to 2ml per gallon of 35% food grade H2o2 to keep the res clean. Warnings, make sure you dilute the h2o2 about 10 to 1 before adding it or you could fry your plants ( it just happened to me
) Good luck