I can't see any pics so I do not know what medium you are using, but soil would require a longer flush than hydro. People do different lengths of flushes, but I do roughly ten days for soil and 4 days for DWC. But in reality it usually varies because I sometiems end up letting the platns go an extra day or two if something comes up, or a day less if they look ready and I got new stuff I want to get to.
Just my $.02 Many people have different periods they use and swear bye.