Flushing Length

I have a 3.5 week old plant in a single bucket drip system. I am using Techniflora nutes, and was wondering how long to flush for if I am flushing once a week.

Tokes To All

why are you flushing weekly? i believe in a nice clean system but thats exsessive, maybe between every rez change or if you have crazy salt build ups, for suture reference, i know most flushing solutions say 1-2hours, i normally try to flush from morning to night