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redox levels
Can someone please explain to me exactly what redox is and how it relates to
plants? thanks. |
#2
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redox levels
SlimFlem wrote:
Can someone please explain to me exactly what redox is and how it relates to plants? It's been a *long* time since I took inorganic chemistry, but I'll try. In a redox chemical reaction there is an exchange of electrons between the REDucing and the OXidating agents. One of the elements, for example Iron goes from having a +2 charge to having a +3 charge. Conversely, something has to absorb that extra electron to balance out the overall charge. But I have no idea how this relates to aquatic plant keeping. -- Victor M. Martinez http://www.che.utexas.edu/~martiv |
#3
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redox levels
"Victor M. Martinez" wrote in message
... Can someone please explain to me exactly what redox is and how it relates to plants? In a redox chemical reaction there is an exchange of electrons... But I have no idea how this relates to aquatic plant keeping. I'm not a chemist either, but as I remember, redox potential has a lot to do with plant biochemistry. There is such a term as "redox potential of aquarium water (substrate?)" which concerns the rate of oxydation - the more unoxidyzed organic residues are in the tank (the "older" the tank is), the less redox it has. Different plants (not only higher ones, algae also) prefer different levels of redox. For example, most fast growing stem plants prefer high levels, echinodoruses - medium, cryptocorines - low. For algae this continuity looks like following: blue green red brown. That is the order in which this ones would flourish in the tank whilst it becomes "older", of course if the tank owner won't interfere the natural processes with continuous water changes, substrate syphoning and fertilization. -- ~SP~ |
#4
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redox levels
"Sergey Politaev" wrote in message
Different plants (not only higher ones, algae also) prefer different levels of redox. For example, most fast growing stem plants prefer high levels, echinodoruses - medium, cryptocorines - low. For algae this continuity looks like following: blue green red brown. That is the order in which this ones would flourish in the tank whilst it becomes "older", of course if the tank owner won't interfere the natural processes with continuous water changes, substrate syphoning and fertilization. Do you happen to have this reference on preference for both the plants and the algae and redox? Regards, Tom Barr |
#5
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redox levels
Xref: 127.0.0.1 rec.aquaria.freshwater.plants:68205
" wrote in message om... Do you happen to have this reference on preference for both the plants and the algae and redox? I've www shortcut just for algae: http://www.thekrib.com/Chemistry/redox.html Although the data concernes sal****er habitat, I think it'd be right for freshwater also, as metabolic activities inside different algae types have a lot in common, and on the contrary biochemistry of cyanophyta, phaeophyta, rhodophyta etc. has some principal definite differences independently of salinity. As for the families of higher plants I have only printed materials, for example "Aquarium and water plants" by Cyrling M. (ISBN 5-286-00908-5), and only in russian. -- ~SP~ People will accept your ideas much more readily if you tell them that Benjamin Franklin said it first. |
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