Evo jedan citat iz novije akvarijske knjige...
"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 light 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."
Kniga je od Peter Hiscocka-
Encyclopedia of Aquarium Plants[/u] ,a a ovo je gore citat, pa za one koji ne razumiju da malo prevedem...
ukratko,
biljke vrlo lako reguliraju fotosintezu i lako se prilagode i reagiraju
na promjene svjetlosti, te im zato ne skodi 'siesta' kako profici
nazivaju rupu u svjetlu...S druge strane, alge koje nisu na takvom
stupnju razvoja se tesko prilagode na svjetlosnu rupu i zato ih ona
ubija u pojam 
.Ukoliko prakticirate, 5-6 sati rasvjete, zatim 2-3 sata mraka, pa opet
5-6 sati rasvjete, biljke æe proæi relativno bez ikakvih posljedica dok
æe rast algi biti znatno smanjen...
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