As long as your using fresh water with no added nutrients and the PH isnât drastically off youâll be fine. You arenât wanting your plants to uptake nutrients from medium (soil, coco etc) any more, so nutrient lockout due to the PH being off shouldnât be a worry.
The principle of flushing of flushing is to flush out the nutrients youâve been feeding your plants from the medium so that the plants can use up what has been stored in its leaves.
Good luck bro đȘ