Define fluctuating CO2 levels

[Jaap]

Hello,

I wanted to know what fluctuating CO2 levels means.

Is it when the CO2 increases/decreases during lights on?
Is it when the CO2 increases/decreases at any time of the day?
Is it when the CO2 increases/decreases within a week?

I have noticed that with the weather getting colder, my pH has lowered with same co2 injection rate. I just noticed that midway through my photoperiod the pH is 5.75!!! Last week I measure it was 6.60!!!

I know cooler water retains more gasses due to a decrease in gas exchange but could have this be considered as fluctuation co2?

Thanks

 

[Jaap]

Can anyone explain fluctuating CO2 levels?

 

[Jaap]

So I have read somewhere that fluctuating CO2 levels is when the CO2 goes from higher to lower and causes temporary deficiencies when the lights are ON....

 

[ian_m]

See this link that CO2 variation over typical tank temperature isn't that much of an issue considering all the other factors that can effect CO2 distribution.
http://www.ukaps.org/forum/threads/id-this-algae-please.34922/page-2#post-374223

Probably true as you don't see people saying "turn your CO2 in the winter as more dissolves and less is needed"....