chemically taste I meant after the nutes not been washed, but will it be fine
Read the following study. It was done relatively recently, and a few of us have been posting it around here. It's obviously not the be-all-end-all answer, but it is a reasonable set of details from a real study that was conducted:

Cannabis Flushing Study on Grow Nutrients I Rx Green
Rx Green’s research study on cannabis flushing explores the truth behind this urban myth in growing nutrients.
