Creating the Dual-Root Zone Growing Bed. (to be filled in)
Acquire a netpot meant for a 5g bucket (link), or any ledge-top (nursery no. 2 worked for me) pot + the bucket's lid w/a hole cut smaller than the top diameter of the pot.
Add water to the bucket. (I'll have a fill line, but *just* under the netpot/pot works)
Dechlorinate the water, if it has chlorine. Well water is fine, city water not so much. San Diego has chloramines in addition to chlorine, and it doesn't "offgass" by just sitting outside, so I have to buy dechlorinating stuffs (apparently Vit C tablets work? check)
Netpot: It is very useful to use a drill, or something that will make circular holes into plastic. I used a "body reamer" used in radio control car hobby'ing myself. You'll want to make a hole in the bottom, center, of the pot. If it already has one, you will need to check its size versus the diameter of the black tubing. It should be snug, you should have to smoosh the tubing to get it to fit, otherwise it might slide out of place.
Cut a length of the black tubing so that it touches the bottom of the bucket, and reaches about 3-4" short of the top rim of the bucket (while threaded through the netpot).
Create two small airline-sized holes in the 'rim' of the netpot, these don't have to be 'snug' like the larger tubing, but doesn't hurt if they are. Thread the two open ends of the airline harness though the holes.
One airline gets an airstone, and can sit on the bottom of the bucket.
The other airline is the 'power' for the air-lift water pump. I pulled it through a hole in the net-pot, and then threaded it down the larger black tubing. You want to push it through all the way, so that you see air bubbles coming *out* of the black tubing. Then, you pull it back just a little, so that the air bubbles stop. At this point, water should start gurgling/burbling/bubbling up out of the top of the black tubing. Its doing so in this photo, but it might be hard to tell.
Some tweaking of the amount of air going to each thing (airstone and air-pump) with the valves is required. I'll post a video when I'm setting one up to ship out, of what I think works well. It also depends on what lives in the tank. Some fish will require a higher dissolved oxygen level than others. Always err on the side of more air!
Basically the same thing, however the air-pump line can run "from the top" (not through the pot) and you'll set its final location after you add growing medium/soil.
Add Growing Medium:
Really. Nothing fancy. Add it till its just covering the air-lift tube from sight.