How long to flush plant?

[Zoneshityee]

Hello, how long should I flush? Hydro

 

[growsince79]

2-3 days

 

[Zoneshityee]

Awesome thank you and do I change the flush water

 

[Edinburgh]

Till it runs clear.

 

[chemistry]

In DWC I flush for a day, as there's no medium to flush.