go with a simple bubbler/DWC system.

Cheers mate, can i ask how often you had to refill the reservoir?

The reason I'm not doing bubbler/DWC systems is because i've not been able to find a small or quiet enough air pump, however i have a a tiny and silent water pump.

Air pumps themselves are not really "loud". It's more they vibrate what they sit on. When I want them quiet, I hang them on string with a spring at the top (maybe from a click pen) to damper the sound.
I refilled the reservoir maybe once or twice a week. It's kind of hard to remember. It was either my first or second hydro build so was several years ago.

Thanks "grizzman" for reply. Your uploaded image and reply are informative for us.
Thanks for sharing it.

Can the pump set up to create a whirlpool effect? If so, that would create enough agitation for oxygen uptake.

Great little window-sill system grizzman!

Here is a link that might be useful: My Indoor Growing Adventure

Thanks Halfway. It was a simple bubbler type system made from one of those disposable tupperware containers.