Sake
Aquarium Advice FINatic
- Joined
- Mar 20, 2012
- Messages
- 515
Well, I use a 2 liter bottle for my 10 gallon, if you're worried about to much CO2, I imagine you could add less yeast. I think for a 5 gallon a 2 liter would be fine. Unless you have shrimp I hear shrimp are a bit sensitive to CO2.