By the way I did some research on bubbles, and I saw different theories on how they work with relation to gas-fluid transfer.

It appears to me the overwhelming evidence suggests smaller bubbles equal more surface area, and they stay in water for longer, and have larger compression.

I can provide a few links, as this is a dynamic subject...
AquaponicHerb Reviewed by AquaponicHerb on . airstones vs airstones Should I use the 99 cent air stones that come in the 3 pack the ones round like a ball. They look like there doing as good as the walmart airstones the middle sized ones. Which 1 of these should i use? Ive bought both. Rating: 5