EDIT: I am on my 3rd TAG (hp pressure) grow using a UFO 90 from Sunshne Systems, supplementing with CLFs and a 26 watt screw bulb LED from Lowes. I am not attempting to replace root feeding, just turbo charge my grow
I just finished rereading the Advanced Foliar Technique. https://www.icmag.com/ic/showthread.php?t=51314&page=1&pp=40 which makes the point that foliage consumes 6Xs more nutes then roots, plus, the nutes are delivered right where they are needed. BUT, the stomatas only open twice a day- once before dawn and once right after lights out.
As importantly as when, due to the size of the stomata openings, they must be delivered as an aerosol (see how below).
While mature TAG roots require just 1-2 seconds of food every 3 minutes 24/7, maximum foliage spray is twice a day- once before dawn and once right after lights out. More often than that could lead to serious problems, but the benefits are tre enticing. They were hand spraying, and still getting excellent results, but a few people provided links to electrostatic foggers.
Regardless of how, growers are doing this, because Dutch Master offers highly developed foliar nutes, like Saturator Gold and Liquid Light, but the key is how to deliver them.
I figured I would at least experiment with hand spraying. Saturator is on its way, but I did not pony up for LL. Wish I had because I think I just nailed the 'how'. And everything I need to experiment is on hand.
As I am set up for d2w (drain to waste) I need
1. A second rez
2. A second hp pump, which I have as a backup anyway
3. An extra deep cycle timer. I may finally have a use for my iGS-011, whose shortest on time is ~<30 seconds; the longest off time 12 hours. Most likely the ~30 seconds is too long, and the 12 hours too short, unless you are doing a 12/12 from seed. Hmmmmmmmmm. In the end I may need a second Sentinel timer.
Seedlings/Cuttings: In the beginning I will put the iGS on the roots and Sentinel (<2 second on time) on the tiny young leaves for the first 2 weeks, then reverse them. Why? My experience is that feeding adolescent/mature roots more than 2 seconds every 3 minutes produces spaghetti roots, instead of fishbones and the all important pipe cleaner fuzzies. I am intuiting that maturing foliage will benefit from slightly longer mist feeding times, as their are considerably more stomata s to feed.
Keep in mind foliar feeding must be stopped once the plants are in bloom mode
TBC