Hi again all,
In a CO2 enriched FW that is on a good nutirent regiment and void of big O2 sinks like clogged filters or overdue canisters the water will become O2 saturated. This is generally viewed as a "good" thing since the O2 comes from photosynthesis. "Champagne" in the tank from excess O2 bubbling away equals healthy plants.
Breathing organisms, like fish, can still die in 02 saturated tanks because CO2 is so high they cant vent out their waste CO2 into the water. Plants may suffer some similar negative effects, again experts argue if/how/why, from having to expel O2 into O2 saturated water. They can expel O2 into saturated water but have to work alot more than when they expel O2 into water with very low 02. This might be an explanation for why circulation rich CO2-mist tanks do better than not so much circulation old "dissolved CO2 only" style tanks.
This is actually a really interesting situation. When expelling O2 is limiting photosynthesis it's the first stage of photosynthesis, photophosphorylation aka light reactions, that is affected. Here water, H20, becomes 02 and biologically stored energy, ATP et.al, by using lightenergy. O2 saturation might therefore halt the plants ability to absorb light.
Since saltwater can hold less O2 maybe this is more of a limiting factor in marine planted?
Could holding corals or other species in symbiosis with zooxanthellae be perhaps be affected? Maybe phytoplankton, being a simpler organism, might not be able to do photosyntesis at all?
Thanks for your time everyone. I'm posting like a madman here when old shelfed FW stuff pop up and gets transferred.
cheers
Mattias
In a CO2 enriched FW that is on a good nutirent regiment and void of big O2 sinks like clogged filters or overdue canisters the water will become O2 saturated. This is generally viewed as a "good" thing since the O2 comes from photosynthesis. "Champagne" in the tank from excess O2 bubbling away equals healthy plants.
Breathing organisms, like fish, can still die in 02 saturated tanks because CO2 is so high they cant vent out their waste CO2 into the water. Plants may suffer some similar negative effects, again experts argue if/how/why, from having to expel O2 into O2 saturated water. They can expel O2 into saturated water but have to work alot more than when they expel O2 into water with very low 02. This might be an explanation for why circulation rich CO2-mist tanks do better than not so much circulation old "dissolved CO2 only" style tanks.
This is actually a really interesting situation. When expelling O2 is limiting photosynthesis it's the first stage of photosynthesis, photophosphorylation aka light reactions, that is affected. Here water, H20, becomes 02 and biologically stored energy, ATP et.al, by using lightenergy. O2 saturation might therefore halt the plants ability to absorb light.
Since saltwater can hold less O2 maybe this is more of a limiting factor in marine planted?
Could holding corals or other species in symbiosis with zooxanthellae be perhaps be affected? Maybe phytoplankton, being a simpler organism, might not be able to do photosyntesis at all?
Thanks for your time everyone. I'm posting like a madman here when old shelfed FW stuff pop up and gets transferred.
cheers
Mattias
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