when should i flush?

hey everyone i am growing in a stealthydro bubbleponics system and was wondering when you should start flushing? i want to flush for 1-2 weeks so if someone could get back to me ASAP that would be awesome?...

that right dude 1-2 weeks

2 weeks before harvest.

torontoone said:

2 weeks before harvest.

Click to expand...

how will i know when two weeks is? i know when to harvest like the trich and hair colors and what they do and stuff but how do you know two weeks before? i didn't keep track of my growing (like a journal) so i am not sure where i am as of budding?..i think like a week or two.