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Lighting for a large tank wpg?? (no co2)

Discussion in 'Are you new to aquatic plants? Start here' started by TankZen, Mar 22, 2011.

  1. TankZen

    TankZen Junior Poster

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    Need help lighting my 180G....no Co2...EI dosing.

    Initially I was thinking 3 (96w CF) 34in however this would give uneven lighting because two fixtures would stretch the entire tank and one would be behind in the middle. 1.6WPG

    I'm wondering if I have 4x (96W coralife CF) will this be too much WPG for a no co2 tank. 2.13WPG

    I have 4 coralife 34in fixtures that came with the tank. Tank dimensions 72x25x25.

    Please help... I know too much light too little co2 can cause big problems.....:confused:
     
  2. jhunt

    jhunt Junior Poster

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    WPG rule doesn't really work. Because of the height of your tank, even four 96W PC bulbs will probably still leave you in the low to low-medium light range. Two-36" two bulb T5HO fixtures or 4- 1 bulb 36" T5 fixtures suspended 4-6" over the top of the tank.
     
  3. dutchy

    dutchy Plant Guru Team
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    I'd just try with what you have now. Low light is exactly what you want with a non CO2 tank. If you get algae, the intensity is probably to high. Then reduce by raising the lights or by using less lights. No more than 8 hours duration.
     
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