Clay balls, air pump, air stones, tote with water in it one or more holes drilled into the top to hold the baskets with your medium (clay balls). That's what people call DWC.
You can run into issues with water temperature which are mitigated by using something like hydroguard (beneficial bacteria) or running a setup with a water cooler (which requires more pipes and pumps and stuff).
Obviously since your plants are no longer growing in soil, which holds nutrients for some time and doesn't need constant fertilization, you now have to mix nutrients into your water solution, along with pH adjustments as needed depending on what you are growing.
It's not that complex and can be really, really fun to figure out.
I hear letting the plants dry out fully between waterings helps get rid of fungus gnats. Let them dry until the pot is obviously super dry when you pick up the plant.
You can run into issues with water temperature which are mitigated by using something like hydroguard (beneficial bacteria) or running a setup with a water cooler (which requires more pipes and pumps and stuff).
Obviously since your plants are no longer growing in soil, which holds nutrients for some time and doesn't need constant fertilization, you now have to mix nutrients into your water solution, along with pH adjustments as needed depending on what you are growing.
It's not that complex and can be really, really fun to figure out.
I hear letting the plants dry out fully between waterings helps get rid of fungus gnats. Let them dry until the pot is obviously super dry when you pick up the plant.