time of light - The Planted Tank Forum
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post #1 of 4 (permalink) Old 03-31-2006, 04:17 PM Thread Starter
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time of light

how long is to long or is it even possible to have your lights on to long? is 14 hours to long? and does it have an effect on algae?
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post #2 of 4 (permalink) Old 03-31-2006, 04:46 PM
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After a certain amount of time, most plants will not benefit from additional lighting, and the excess lighting period can certainly promote algae growth. Most folks this forum seem to use between 8-12 of light, so I went with 10 hours for my tank.
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post #3 of 4 (permalink) Old 03-31-2006, 04:52 PM
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Yes, too long a photoperiod will definitely have an effect on algae! If you have stem plants, you can see them 'closing up' after a certain amount of time. I see this in my Rotalas, and aromaticas after 9 hours. My photoperiod is 10hrs.

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post #4 of 4 (permalink) Old 03-31-2006, 05:12 PM
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agree with above you want intensity longer duration wont make up for this.
mine are on 2p-11p

Eclipse system 12
heavily planted
AH 36w retro kit light 2pm-11pm
Substrate: Flourite
Pressurized Co2 with Red Sea 500 Reactor
jbj regulator

10g shrimp Only tank
Flourite Red
28w corallife aqualight
Various Mosses.
whisper 20 w/ sponge pre-filter.
Feeding HBH Lobster crab bites and Algae Wafers.
No Co2 and very light fertilization
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