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Thread: light in 2 feet tank

  1. #1
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    light in 2 feet tank

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    will 72W of light in a 2 feet tank cause an outbreak of algae?
    if yes
    how shd i curb it
    and wads the amout of co2 i shd have to minimise algae growth?

  2. #2
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    Hi,

    Your lighting is good enough.

    To prevent algae outbreaks, you need to increase your co2 level to 30ppm.

    As for the nutrients, you must have sufficient, limited in one will result in alage outbreaks.

    Important nutrients are k, no3, po4 and also other micro as well such as fe..........

  3. #3
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    reccommend a complete fertiliser to use?

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    and wads the differnece between a 6500k and a 8000k PL light?

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    6500k light looks 'white'. this closely resemble light at noon.
    8000k light looks more bluish compared to 6500k.
    and this is known as light temperature.
    thomas liew

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    Minor correction... it's colour temperature.

    Colour temperature is the colour of light corresponding to the light colour emitted by a black body heated at the specific temperature in Kelvins(K).

    Generally:
    (Low K) Reddish/Orangey ----> yellowish ----> whitish ----> bluish (high K)

    BC

  7. #7
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    i beg to difffer on the part on 8000 being more bluish. Instead i feel that 6500 is a little too yellow for my liking and 8000k is white as in real white and it works well for my tank.

    Generally, 6500 - 8000k works fine for planted tanks, some even go to 10000k but i m not so sure about that.

    72 W for your tank is good provided you get fast growing plants and that the rest of your plants in the tank have matured and you are providing enough co2 and nutrients. However, its always better to have a little less than a little more, heh for nutrients.
    Holy is the Lord, God Almighty ! The Earth is filled with His Glory !
    90 x 50 x 50 cm tank: Eheim 2217; ANS CO2 Solenoid with 60mm intense bazooka; Zetlight 6400; Teco 500 Chiller; Borneo Wild Steel inlet/outlet
    Ferts: Dry Mixture/Dr Mallicks. Temp: 26 degrees Substrate: ADA Amazonia

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    6000-6500K is generally accepted as white or daylight. And 8000K is consider slightly bluish. This is by definition. You can refer to the chart in this link: http://en.wikipedia.org/wiki/Image:PlanckianLocus.png

    How a light source render colour is another thing, especially for flourescent lamps. There is another factor call colour rendering index (CRI) to consider what you talk about how an colour object appears under a light source. Coloured objects may appear differently under different makes of 6500K tubes. This is because FL do not emit a continous spectrum like the sun do. FL combines different colour phosphors to obtain the apparent colour temperature required.

    BC

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    Quote Originally Posted by tanyingzhou
    reccommend a complete fertiliser to use?
    It's up to you. Most of us here use loose chemical ferts I think. There's no "all-in-one" fertiliser.

  10. #10
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    oic, bclee, ok thanks, well just my perception, i have 8000k and comparing to the 6500 (midday sun as they call it) i feel that the 8000k is nicer and gives a 'whiter' feel compared to the 6500 which is yellowish in my opinion but well, how can i argue with wikepaedia heh

    Anyway Ying Zhou nice meeting you today hope everthings fine with the lights and like i said, LGA is the most general type, good for a beginning aquarist, as that is what i used initially
    Holy is the Lord, God Almighty ! The Earth is filled with His Glory !
    90 x 50 x 50 cm tank: Eheim 2217; ANS CO2 Solenoid with 60mm intense bazooka; Zetlight 6400; Teco 500 Chiller; Borneo Wild Steel inlet/outlet
    Ferts: Dry Mixture/Dr Mallicks. Temp: 26 degrees Substrate: ADA Amazonia

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