wicking

I've been growing in 1L airpots in coco, watering the tray and letting them wick it up (bottom-feeding). Here's how I set up my airpots: First, because the base sits in the space between the inward facing holes, there's a small air gap at the bottom. Eventually the roots will grow past this...

Has anybody else here had success with zero/minimal runoff coco grows? What approaches do you use? I started out by hand-watering coco to 20% runoff every time, because the Coco for Cannabis site insisted it was required to prevent salt buildup. That quickly got old, so I set up automated...