Regarding the CO2 mist advantage over purely dissolved CO2... I have noticed this in my tank during the latest week.

I initially set up things in a way that CO2 bubbles went straight to the canister inlet tube. That certainly dissolved all CO2 and I could track that by measuring PH and KH. Plants also pearled regularly.

But then I switched to a CO2 difuser and the result is visually noticeable. Plants started pearling with "big" bubbles sticked to their leaves. Something that didn't ever happened with pure dissolved CO2.

This was even injecting less bubbles per second.

And it seems to me that it is not a matter of having CO2 lost somehow when I was injecting bubbles into the canister inlet, because again, I see that the PH is a little higher now with the mist from the difuser and less bubbles per second.

Regards,
Evandro.