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Last CO2 comments
Ok, I am sure people are getting tired of this thread, but I have a
couple last things to say. Many people stated that their empirical
analysis showed the water movement was responsible or at least
encouraged algae growth.
After thinking about what everyone said, and recalling my own
research and experiences I believe my conclusion is that water
circulation is not the factor in the algae growth. Instead, it is a
transport mechanism. I mentioned this in my previous post that I
believe water circulation brings nutrients to nutrient deficient
regions. As a result, algae might grow in a location where a stream
of water reflects of the glass. This, in my opinion, is a sign that
the tank has an excess amount of nutrients and lacks either:
filtration capacity; the number of plants assimilating the nutrients
is to low; or they are slow growing plants. End result: excess
nutrients in the water column allows algae to grow.
I also own a copy of the German edition of Christel Kasselmann's
Aquarien Phlanzen. I do not believe I have to vouch for her. She is a
recognized expert on aquatic plants. In this book on page 20, she
argues that plants in stagnant ponds have a layer of nutrient
deficient water surrounding them. As a result, plants in moving water
tend to grow faster and gain access to more CO2.
Menlo Park, CA
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