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Re: [APD] Light cycle and algae
The reports have been spotty, and in some of those reports,
so has the glass ;-)
This notion started, I believe, when someone figured that,
since it rains in the tropics so often, plants must like to
have shady periods during the day. Of course, it could just
mean that plnats in the tropics get shade whether it does
them any good or harm or not.
I think one is as likely to get the results by cutting back
from say 14 hours to 10 or 12 hours. And for avoiding
algae, nothing seems lots fo plants, well fed, and water
--- Alan Walker <walker at netcon_net.au> wrote:
> I recently read in a beginners' book (*) on aquatic
> plants the assertion "It
> is possible to combat algae in the aquarium by (...)
> creating a "siesta"
> period. (...) 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 (...) but algae growth rates
> will be significantly
> reduced and may even start to die back."
> Does anyone here have empirical evidence about the
> effectiveness of this?
> I'm not interested in opinions about why it ought to work
> or not work, but I
> am very interested in data from controlled experiments.
> Alan Walker
> *Encyclopedia of Aquarium Plants, Peter Hiscock,
> Barron's Educational
> Series, 2003, ISBN 0-7641-5521-0
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