air watering

you displace the gass in the soil. but as the water pulls thought it brings more gas and in that gas their is o2, you can dissolve air/gas including o2 into the water and it can provide a bit more, but its comes out pretty quick and goes in pretty quick as well. shaking the bottle or string the pot is enough vs using a air stone. bigger issue is soil compacting and preventing proper gas exchange. If you want to keep it simple bubble it for 5 min before use.

A SMALL FISH TANK PUMP AND AIR STONE CAN ACHIEVE NEAR SATURATION LEVELS OF DISSOLVED OXYGEN WITHIN 2-4 HRS DEPENDING ON WATER TEMP!!! COOLER DA WATER DA FASTER!!! IF YOU HAVE CHLORINE ITS GOOD TO BUBBLE DA WATER FOR AROUND 24 HRS!!!!

Oxygen moves by diffusion approximately 10,000 times faster in the air than it does in a saturated soil. Good to know.

Generally I'll water every other day, reload and refill with water and allow to bubble until next feed, fertilize and go. Repeat. Want a small opening to limit co2 absorption. I generally do 5 gallon at a time and the wayer is fluffy and bubbles after 12-24 hours there is a noticeable difference, try not leave organic matter in there too.