Yes, I just searched on h2o2 and found the dose. Searching on perioxide was far less effective. I'll add the peroxide now. I'll also double check to see if I could remove anymore bad roots to ensure a good cleanup.

Loc - why is the nute crystal formation bad? Because it shows a reaction and this reaction creates a scenario where the nutes are negated? And the plants don't get fed? Is that what you mean?

Hmmm... I'm not sure what to do about that now. I removed quite a bit of solution from the tanks after I did the 'bad mixing'. PPM now around 800. Should I go to the effort to get all the solution 100% of out these tanks because I screwed up? Hate to waste the nutes but if I messed them up - then I need to?