Dave S wrote:
Is there any value with pumping CO2 into an aquarium during the day and
oxygen at night?

Thanks - Dave


Yes, but it's not needed, the plants add pure O2 as a by product of
photosynthesis. Adding CO2 increases the growth and thus the O2
production.

Typical O2 levels are 120-150% near the end of the day.

Regards,
Tom Barr

www.BarrReport.com