RDWC poll to flush or not to flush

What are your experiences. I see so much varying info on this. I've only done outdoor grows so this is new territory for me.

The only time flushing makes any sense is if you are in soil AND the soil has excess salt build up from over feeding.

Other wise, flushing is for toilets

No flushing here in hydro. I do however taper off my ppm the last week or so from 7-800 down to 400 or so by chop day.

I'm hydro and no flushing for me iether.
At 3 weeks to go I half the nutes each week.
Clean n smooth every time.

Running mine I'd always flush the first day between veg and flower and then one day between week 4 and 5. You're not running a standard grow medium so there's no "build-up" to concern yourself with flushing. Your reservoir is literally giving you "run-off" readings every time you check it which allows you to change your nutrient solution immediately on the fly instead of having to flush out improper feed issues out of media such as soil/coco