If you just talking about very slight pearling as in bubbles trapped under leaves and coming up every few seconds then I get that in my 10G w/ 2x 13w spiral bulbs w/ no CO2 just minimal ferts.
I would suggest 2x 1 liter bottles for a 10G DIY so you can alternate changing them out and get more consistent CO2 production
I would suggest 2x 1 liter bottles for a 10G DIY so you can alternate changing them out and get more consistent CO2 production