With organics what exactly are you flushing out? Flushing works with bottled nutes by removing the excess from your soiless growing material. With organics there are no salts it uses bacteria and fungi to break down the organic matter and make it available to the plant. All you are flushing out...
Well in Canada it's illegal to Denature Isopropyl as what's the point it will kill you in you drink it and I've let it evaporate and there was nothing left over even after scraping pyrex with a razor blade
I take it your the extraction expert from everything I've read and seen on here. Why do people hate Iso extractions like they are somehow dirty and gross as far as I have read it's one of the safest, cheapest, and best yield and evaporating solvents. Yet everyone online says it's shit meanwhile...