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What type of light is this?

Discussion in 'Lighting' started by Fallen_angel42, Jun 10, 2010.

  1. Fallen_angel42

    Fallen_angel42 Junior Poster

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    Okay, I've gotten so many people telling me this lighting system I have for my 29 gallon tank is low, medium, and somewhat high. Can someone please give me a straight forward anwser! I have a T-5 48W over it, which is about 1.6 wpg. But I know the watts per gallon rule doesn't really apply to T-5 lights. So which is it, low, medium, or high:confused:. If it's high I'm going to buy stuff to test the Kh and Ph and put DIY Co2 and dose with liquid ferts. I don't want to have to buy the Kh and Gh testing and the DIY CO2 if I have low light, and all that would cause is a algea bloom.:(
     
  2. dutchy

    dutchy Plant Guru Team
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    What are the dimesions of the tank and how high is the T5 above the water surface? What is the distance from water level to substrate? Do you use a reflector?

    regards,
    dutchy
     
  3. Fallen_angel42

    Fallen_angel42 Junior Poster

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    The dimensions of the tank are 30 1/4 x 12 1/2 x 18 3/4 and the light is about 3 in from the water. The water level to the substrate is about 16 in. and I do use reflectors.
     
  4. dutchy

    dutchy Plant Guru Team
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    So that's a total of 19 inch from light to substrate. According to measurements with a PAR meter this will give you around 65 micromol of light at the substrate, which is medium light. Plants need around 30 to 35 micromol as a minimum to keep growing. Your light puts out twice that much. If you're not using CO2 you could raise your lights another 5 inch. If you have a fixed white painted canopy and can't raise your lights you could remove your reflector which in both cases will bring you back to around 45 micromol, low light.

    regards,
    dutchy.
     
  5. Fallen_angel42

    Fallen_angel42 Junior Poster

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    Okay, I will use some sort of DIY CO2 and check it by using the chart with KH and PH to see how much ppm of CO2 I'm getting. Now, I might try to use the EI dosing of ferts

    20-40 Gallon Aquariums
    +/- ¼ tsp KN03 3x a week
    +/- 1/16 tsp KH2P04 3x a week
    +/- 1/16 tsp (5ml) Trace Elements 3x a week
    50% weekly water change


    Is this ideal for my tank set-up, I plan on having it stocked to the brim with plants :) But my selection is limited, I plan on using the Hagen CO2 Natural Plant System, I have heard good reviewes with it. Should I but it and toss the ladder for something more diffusable, like a nano glass diffuser? Someone did tell me it waste alot of CO2 because the bubbles are so big. :/
     
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