Yeast-generated CO2, suitable for a small tank?

A planted 10g with 3.0wpg? (Easily upgradeable to 5.0+wpg in the future, if/when I get things dialed in).

If so, I'm wondering whether the Hagen bubble ladder or the little submersible pump w/ venturi that comes with the RedSea kit would be better for dissolving CO2 into the water. The ladder seems cheap enough, and I Could make my own CO2 "generator"(aka bottle).

The mfg's(hagen and redsea) mention the reaction is "ph stable"; I've read that this is from the introduction of baking soda. What does this do?

I'm dealing with some thread/hair algae right now in my newly planted 10g. I read that dosing with Flourish Excel will help, not sure why...perhaps it will help the plants establish themselves faster? Either way, I'm looking into CO2 for the future, and if the yeast method is reasonable for a small tank and small amounts of CO2 then that might be sooner rather than later.

The algae is probably only temporary, there's a lot of phosphates in my water right now(no longer using that buffer lol), they'll get changed out/used up. The plants haven't had any time to establish themselves. Once I get my wisteria in I'll change out a fair amount of the water. (Then, when my heater gets here I can finally get that bio-media from my friend and add some fish lol)

After reading what Seachem has to say about Flourish Excel, I think I'll give it a try. A small tank means a small bottle will last a while, long enough to determine if it works and how well, I hope.

Edit; I should clarify what I meant by asking if it was suitable for a small tank is that I assumed it might be up for debate whether it was suitable for any size tank, but that perhaps a small tank was a better candidate.