To flush or not to flush before harvest....

[Zandor]

so flushing means to use to use distilled water instead nutirent right?

Well you don't need to go to the expense of distilled water. But good quality water like what you have been using is fine. You still Ph the water and it's best to flush with a commercial flusher like flora Kleen, ClearX or the one that advanced nutrients makes.

But just stop feeding N 10 day's before you start your flush.

Then some where around here I posted a how to flush and know when you are done.