Photosynthesis takes place in all plants that contain chlorophyll.
There was no effect of aluminium on sodium efflux at pH 4.0.
dioxide is quiet important for Photosynthesis the formula below shows
how is works:-
[IMAGE]Text Box: Carbon Dioxide + Water Glucose + Oxygen
So I think the two main factors in this experiment that effect the
rate of photosynthesis are the amount of energy produced by the light
and the amount of carbon dioxide available to the plant so when the
carbon dioxide starts running out the amount of oxygen produced will
start dropping so as the level of sodium hydrogen carbonate increases
the amount of oxygen produced will increase.
The Effect of the Amount of Sodium Bicarbonate …
Carbonate used only by itself should only be used if you have a low pH and Alkalinity. If it's to buffer up the Alkalinity, Bicarbonate is better.
To stop the Sodium Carbonate ions from consuming too much H+ and to keep a pH of 7.0 we need to restrict the amount used, as it is always looking for H+ ions to consume. This is why I often prefer using products that not only contain sodium carbonates (or sodium bi carbonates), but the proper ratios of other minor elements such as Calcium and Magnesium.
The use of products such as Sea Chem Buffers; Marine, Gold, Malawi, Victoria for marine tanks and many freshwater tanks (such as livebearer, goldfish, rift lake cichlids) is an example of my preferred methods for KH/Alkalinity maintenance in these tanks. What is noteworthy is that all of the previously mentioned SeaChem buffers have basically the same formula, what differs is concentration and the amount you add to buffer to the desired alkalinity & pH
Aragonite and Seachem Cichlid Salts can also supply carbonates as well.