Originally Posted by Mr. Overfilter
If a planted tank depends on surface agitation\flow for oxygenation will that create a problem?
Its about balance. In a high light situation with CO2
, the plants will produce O2
through photosynthesis at a higher rate than it is depleted through other processes.
With the CO2
on and airstone off during the day, you should have high CO2
dissolved in the water. You turn off the CO2
and turn on the airstone at night so you arent wasting CO2
and maintain O2
through surface agitation. CO2
arent interchangeable. Its possible to have high enough levels of both with the correct balance of CO2
and light and plants.