[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [APD] Lighting "siesta" period

This midday overcast idea has been around for some time
without any good evidence showing up to support it. Tom
gave a pretty good run down (pardon the pun) on it

Since it's possible to combat algae quite successfully
without doing this, it could be hard to ever actually show
that stormy middays make a diff.

The opposite idea of generally low lighting levels with a
short period high light is an interesting turnaround on the
idea. Don't know if it does anything more for avoiding
algae but it's interesting anyway.

--- "Tim" wrote:

> In his Encyclopedia of Aquarium Plants (2003), Peter
> Hiscock writes:
> "Plants are able to regulate the rate of photosynthesis
> relatively
> easily, and quickly respond to changes in light
> conditions. In other
> words, they do not take long to warm up and start
> photosynthesizing once
> there is sufficient light. However, algae are not as
> biologically
> advanced as plants and need a long and relatively
> uninterrupted period
> of light to function properly. It is possible to combat
> algae in the
> aquarium by controlling the intensity and period of
> lighting in the
> aquarium and creating a 'siesta' period. This is a period
> of darkness
> that interrupts the normal day/night cycle in the
> aquarium. If the
> aquarium receives 5-6 hours of lighting followed by 2-3
> hours of
> darkness and then another 5-6 hours of light, the plants
> will be
> relatively unaffected and receive enough light throughout
> the day, but
> algae growth rates will be significantly reduced and may
> even start to
> die back."
> Is anyone aware of any empirical or even anecdotal
> evidence that would
> support this assertion?
> Tim
> Portland, OR
> _______________________________________________
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
> http://www.actwin.com/mailman/listinfo/aquatic-plants

Aquatic-Plants mailing list
Aquatic-Plants at actwin_com