Well don't sweat it, flushing is HIGHLY overrated. Studies have shown it does nothing except actually cause elevated levels of zinc for some reason.
can you link any other studies?
I found this which does mention increased Iron and zinc levels. but also says they are within "normal levels"
Fortunately one study doesn't make something overrated in the scientific community I hope more research is eventually done.
Rx Green’s research study on cannabis flushing explores the truth behind this urban myth in growing nutrients.
www.rxgreentechnologies.com
This backs up at least far reducing nutrient feeds at the end of flower.
"Plants that are nearing the end of their life cycle will uptake fewer nutrients as they remobilize nutrients from other plant parts. This may explain why little difference was observed in the mineral content of flower flushed for different times."
I did not see mention of RO being used for the flushing but I imagine that is the case. It raises some interesting questions about flushing for sure.
I Personally just try to drastically reduce what I feed up till the last two weeks then straight water maybe some additives. but not heavy npk.
Statistically the study can be improved on but its a good starting point, sign me up to be a tester...
CONCLUSION
In a first of its kind study, Rx Green Technologies evaluated the effects of flushing period on yield, potency, terpenes, mineral content, and taste characteristics of Cannabis flower. Overall, the length of the flushing period did not impact yield, potency, terpenes, or taste characteristics of Cannabis flower. Taste test results indicated a trend toward improved flavor and smoke quality with the zero-day flush. While there were no significant differences in nutrient content, there was a trend toward increased iron and zinc in flower flushed for 14 days. The results of this trial indicate that there is no benefit to flushing Cannabis flower for improved taste or consumer experience