Critical Purple Auto in COCO: close to harvest.

It depends how you would like to finish your plant as everyone has there own opinions. I feed every watering with a 15% or more run off, some people plain water between feeds etc. I have used coco for years and have always flushed towards end. I reduce the nitrogen when im about 3 weeks into flower and then reduce again around 2 weeks later. I stick with this feed untill 1 week before i harvest when i give them a good flush before just giving them plain water for last 5/6 days. I dont ph my last weeks water, maybe im just lazy but i have done it in the past and not noticed any difference at all. I still turn my light off for the night before chop although its more from habit than anything else at this stage. Again though everyone has there own ways and i am sure you will find yours but hopefully there is something there to help.