I haven't been able to find the original info I based this on, it has disappeared from the internet.

But they pointed out that the optimum voltage to produce "colloidal" silver was about 30V.

The Bubbler was to keep some (but not a lot of) circulation going in the water.

The commercial unit @mericanhomestead showed in his video uses a magnetic stirrer, commonly used in chemistry labs.

IIRC it was because no movement allowed larger particles to form in the water and with CS, smaller is better.