Biotop Carbanator = CO2 injector ?

[Good_Times]

I found this website about these natural pools that they make in NZ. It's basically a very clean pond without fish.

Part of their success too keeping their pools free of algae is due to a product they designed called the biotop carbinator.
This among other things reduces the pH by pushing air from under the ground into the pool.

So I was wondering if this is the same as a CO2 injector used in planted setups ?
Since I know that CO2 reduces pH and I've also heard alot of advice on removing algae by using CO2 injection.

Here's the link: http://www.naturalpoolsnz.com/concept.html

 

[joe jaskot]

Reading more on the subject, it seems very similar:
[h=2]Biotope carbonator[/h]
Stagnant water tends to accumulate nutrients such as nitrate and phosphate, which are brought in through active dust or leaves for example. These nutrients form the basis for increased algae growth. In addition, intense sunlight also promotes its growth. The increase of the ph-value in the water is connected to the algae growth. Algae have good living conditions in high ph-values while water plants, which compete with algae for nutrients, prefer low ph-values. The Biotope Carbonator is patented by Biotop and was developed after many years of research. It works with pure air. Ground air is sucked up through pipes outside of the natural swimming pool and blown back into the natural swimming pool via the Carbonator. The ground air, which has a high level of carbon dioxide, reduces the ph-value in the natural swimming pool. Algae growth is permanently reduced and at the same time, the living conditions for the water plants are fundamentally improved.

 

[Good_Times]

But does lower pH water favor all water plants ( like cattail, canna's, reeds, lillies et cetera) or just submerged water plants like in an aquarium ?​

 

[joe jaskot]

There is a relationship between pH, carbonate hardness (KH) and CO2. Basically, the lower the pH level and the higher the KH level, the more CO2 will be available for the plants. However, not all plants like a low pH. Most aquatic plants will do fine between a pH of 6.5 and 7.4.

 

[Good_Times]

But do plants with their foliage above water absorb CO2 with their roots ?