Co2 and air

[Joeyv78]

Should u pump co2 during the day and air at night? Can to much co2 cause the fish to scratch

 

[George9]

Should u pump co2 during the day and air at night? Can to much co2 cause the fish to scratch

Yep. That's what you do with pressurized co2. Not sure about scratching, but I know theycan suffocate from too much co2

 

[aqua_chem]

You can just turn off the co2 at night an call it good. No reason to run air at night if you have adequate surface agitation.