Looked at a couple of my grows and the ones that faded were harvested about 2-2.5 weeks after they started to fade. The Super Skunk I grew could have easily gone another 5-7 days and that 1 started fading around F46-48 with a harvest on F63. My Amnesia lemons weren't far off that timeline either. Never done Coco but seems a lot of people only do a 1 week flush with coco and have good results. I would recommend feeding like you are, they look good.. then start the flush when you think you should harvest it... all cloudy and some amber... or however you prefer your trichomes.