Tom said:
"You might slap your head. What do plants do during the daylight? Remove
CO2=> Causes the pH to shoot upwards. Measure the pH on a fully planted
non
CO2 tank."
Thanks for your advice. It is always useful and thought provoking. But
in
the hypothesized case - essentially a soil substrate, 2 wpg, new tank,
plants not growing much if at all - I suspect that there wouldn't be much
variation in the average of the
diurnal CO2 concentrations for the first weeks. Later, sure.
I also suspect that the change in the day-to-night CO2 concentrations
would
be small in such a tank compared to a high tech environment, since the
plants would be growing at a much slower rate.
So in this case, control of water column nutrients and a dose of patience
would be the only way to treat the algae problem in this case, I would
think.
Bill