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Re: [APD] uptake of nutrients, day vs night

I believe Diana Berberich wrote this email section below:
> Hello Folks:
> I have been seening some of my plants pearling.  A good sign.
> What I want to know is what types of nutrients do the plants take up in
> darkness (night cycle) as opposed to the light (day cycle).
> I noticed that sometimes if I add a dose of nutrients at night the tanks
> will look crystal clear in the morning.  The plants look nicer as well.
> Some plants will also become lighter or paler in color, taking on a
> bluish tinge in the leaves, and continue healthy growth despite this.  So
> I presumed that something goes on at night that does not occur in
> daylight.  I do know that the plants will begin uptake of oxygen at
> night, thus competing with my fish for air.  So I use a keralia nano to
> circulate the water at the surface to gently get more oxygen into the
> water at night and this works (the nano is on a timer).  If not I find
> fish gasping at the top in the morining, due to all the plant growth.
> During the lighted period the plants take up CO2 and so my fish are fine,
> due the plants giving off oxygen into the water.

Good question.
I know plants do photosynthesis by day
Though respiration is 24 hours.

The respiration part involves taking O2 from the water and uses internal 
sugars generated by photosynthesis by the day and releases CO2+water+energy?

But I'm rather ignorant of the details of the night process.

I did find this:

Respiration :
C6H12O6 + 6 O2 to 6 CO2 + 6 H2O + Energy

Carbon dioxide + water + light energy to glucose + oxygen + water

So does a plant make sugar during the day and then burns it at night and 
during the daylight to make more plant material. Which means they absorb 
nutrients 24 hours but mostly during the day?

Please correct me someone. ;-)

Stuart Halliday
200 Million years in the making...
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