27 gallon black and yellow tote filled with Jack's 3.2.1 ph 5.9 sitting on a wire rack shelf, elevated.
Install two tropf bulkhead connectors toward the bottom to feed a loop of their red tubing. Put a quick release shut off about a foot in on each side (makes pulled res out a lot easier). Half way through loop, at the furthest point, put a bleeder valve.
Connect your soaked and filled carrots, saturate your coco pots, and open the carrot to bleed air and pull back flow to a hanging drop. Many folks will tell you to dial it back a notch or two but don't. Run jacks into coco and let it run off a little bit. Wet media.
A 27g tote will keep a 5x5 wet fkr two weeks in good climate. The carrots only activate if the media begins to dry so it is literally On-Demand. It really doesnt get much better for small grows. Thanks can come later.
PS. Don't walk away but check regularly for runaways. Once they are set, rhen you can forget.