DWC Flush tips?

[Airnova]

I am going to flush for 10 days on my blue widow before I harvest. I am curious if 10 days is to long of a flush? I have been feeding it lucas formula using GH flora series, GH Calmag veganix as well. Any and all dwc tips and tricks would be greatly appreciated.

[shineman]

i don't know if it was the right way to flush, but for the last 2 weeks before harvest of my white widow i just added plain water that i adjusted for ph. no nutes. it didn't seem to matter to the plants and the taste was ok to me.
gary