I think if that were the case then someone would already be doing it. Once the material is saturated the water shouldn't flow across at all, so it's actually a block, I would think. Whereas any size opening, without a block, would admit water through as a flow, even if it was very narrow.
Samala, Renee From: David AuBuchon [mailto:aubuchon.da...@gmail.com] Perhaps if you omitted the sponge, but made the connecting tube reeeeally narrow, that the electrolysis would outpace the mixing of the water, and some distinct product could be produced with silver electrodes?