I've tried researching this, but with no luck. I just got my betta for my planted nano tank. I plan on making this a thriving tank all around, so the betta and plants.
I want to do CO2 (DIY) but since its a smaller tank, I don't want to inject too much and give the poor little guy CO2 poisoning. Is this possible since he is a labyrinth fish?Also, how much would the would the ph change affect him?