Goal: 30ppm CO2. All the time? During light hours?
Just bought a used pressurized CO2 setup from a local aquarium owner around here. The setup is as follows:
5lb CO2 tank
milwaukee pH controller
Aqua medic CO2 diffuser 100 (the glass/ceramic diffuser thing)
8 US Gallon tank
timer to control the CO2 setup
I understand that a pH drop of 1 equates to ~30ppm CO2 (ie. my tank's normal pH is 7.5, so I would want the pH to measure 6.5 for 30ppm).
- Should I maintain 30ppm CO2 at all times, even at night (thus I wouldn't need a timer for the CO2 setup, and would just let the pH controller control the CO2 at all times)?
- If not, should I have 30ppm CO2 by the time lights turn on?
I know that fluctuating CO2 levels can cause black beard algae, but at the same time, pumping CO2 at night might suffocate the fish excessively. Voice of experience, please!