Oh yeah I’m going to flush on Monday too.
This will be by 3rd flush.
I’m not really sure on the “official” process of flushing coco but when I do I just run a bunch of tap water through them, let them sit like 20 minutes then run some gallons of feed through them.
It’s worked so far. The only PITA is after that’s all said and done, I let them drain in their feeder SWICK(?) stands for a day then fill those.