Flushing with florakleen

Hello Rollituppers! My harvest is in 3 days, I am using a dwc system. im going to use florakleen during the last 2 days im just wondering how long i let the solution sit in my resevoir for before exchanging. The instructions for nutrient changes say to drain it after 2 hours. But says nothing for the final harvest time. i dont want to leave it in for 24 hours until i get some clarification. Thx

?

I have Florakleen. I don't have an answer, but it seems like it'd be the same procedure as nute changes,

I've got florakleen too. I only used it once, if I flush now it's with just water.

I don't do hydro but adding new chemicals to the res during the flush seems iffy imo.

i used the nute change procedure sunny suggested, worked beautifully. white ash boys, white ash