I am attempting a new way of flushing. I let my rez go down super low and put in about 2 gal of water into the remainder of the Rez. I will keep adding straight water once it goes down again. After 2 days I will crank the flow up to ensure they get a decent amount of runoff. So my flushing is automated as well! Having grown hundreds upon hundreds of plants in Coco and testing runoff EC religiously countless times during flush, I know that the smaller the container, the faster the plant leaches nutes in flush. Kinda common sense, but numbers don't lie. I flush my 2 gal 7-14 days, depending on how I long I want them to go for harvesting purposes. If I want to extend the flush, I don't flush as hard. These 1/2 gal COULD easily flush in 5-7 days. I will shoot for 7, with this Automated flushing...that's why I am just reducing the strength for a few days. By then it will be almost pure water in the Rez.