The quick answer to that is ............. Yes !
You can even make up a DIY system using old 2ltr pop bottles.
I used to use the hagen/nutrafin system simply becuase the diffuser was pretty good for a yeast based system.
However having seen these
Sprio Infinity diffusers over on AquaEssentials site, I'd much prefer one of those ... they look far better and take up
less room, and they are designed for yeast based systems (Pity I no longer use yeast for my Co2).
You can also use small glass/ceramic diffusers, however I found that whilst they were fine to start with as soon as the yeast co2 production slowed down they worked less well.
Al