High light and CO2??? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 05-02-2011, 01:55 PM Thread Starter
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High light and CO2???

why is it a must to have CO2 when you have intense lighting?
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post #2 of 13 (permalink) Old 05-02-2011, 02:53 PM
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Because of high lighting there is a substantial increase in photosynthesis which causes a drop in CO2 levels in the tank. When the CO2 levels decrease the tank is more vulnerable to algae issues.


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post #3 of 13 (permalink) Old 05-02-2011, 02:57 PM
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the big ugly green monsstteeerrrr...


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post #4 of 13 (permalink) Old 05-02-2011, 03:31 PM Thread Starter
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lovely. I just ordered a 4x54w t5 light with 65k bulbs. I will be ordering a CO2 system within 2 weeks.

would it be bad to have the T5's on the tank 2 weeks before the co2 system gets here?
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post #5 of 13 (permalink) Old 05-02-2011, 03:32 PM
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Yeah

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post #6 of 13 (permalink) Old 05-02-2011, 03:35 PM
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Raise them up HIGH or screen them or only turn on 2 bulbs. Gotta use your new stuff at least a little! If your tank is less than 100 gallons those modifications might be permanent.
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post #7 of 13 (permalink) Old 05-02-2011, 03:53 PM Thread Starter
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its 120G 4x2x2
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post #8 of 13 (permalink) Old 05-02-2011, 04:14 PM
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Turn the day light cycle back a bit, maybe only run the lights for 3-4 a day until the CO2 arrives.


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post #9 of 13 (permalink) Old 05-02-2011, 04:21 PM
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Personally I wouldn't start a hi-tech tank without all the pieces in place which would include co2, lights, ferts, discipline.

It's not like a puzzle that you could start and add the rest of the pieces a month later.
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post #10 of 13 (permalink) Old 05-02-2011, 04:22 PM
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I would just use your old lighting until you get the co2 system.

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post #11 of 13 (permalink) Old 05-02-2011, 04:29 PM
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The lighting/CO2 issue has been covered, but houseofcards is right - if you don't have comprehensive ferts - N,P,K + Trace, the high lighting will still be better for algae than your plants.

At low light levels, there is enough CO2 naturally, and nutrients from organic decay, in the water for the plants to keep up with the lighting, so no algae issues.

At about medium and higher lighting, plants require more CO2 and nutrients than can be provided naturally, so additional carbon and nutrients are required. When either - or both - the carbon sources or nutrient sources are lacking, algae can take advantage, as it needs minimal amounts of either to thrive.
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post #12 of 13 (permalink) Old 05-02-2011, 05:08 PM Thread Starter
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thanks everyone!
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post #13 of 13 (permalink) Old 05-02-2011, 08:18 PM
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well said kevmo

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