CO2 during the day and Oxygen at night

Re: CO2 during the day and Oxygen at night

No, there amount of O2 added at night will do nothing for the plants.
They have much less O2 demand/consumption than fish/shrimp etc.

The plant might be growing better simply because you have more current and you have a higher bioload(fish/shrimp).

Added current can help during the day also.

But adding O2 at night is not the issue, if you have decent growth during the day, even a well stocked Disacus tank with 2w/gal tends to not fall below 90% stauration, that is about at best what most aeration can do. Plants add pure O2, not 20% O2 from air.

So we get more than 100% during part of the night, then turning it on after it dips below 100% is not a bad thing, but I doubt that is the reason for better growth(adding O2 for the plants).

Regards,
Tom Barr