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Thread: UAS not growing

  1. #11

    Join Date
    Dec 2011
    Location
    USA
    Posts
    160
    the recommendation is one 3W LED for every 4 sq. inches [is this 5.3 cm?] with a diffuser of some kind or a bit wider apart for ones with no diffuser.

    I run mine at 18 hours on, 6 off and don't get yellowing. I did at first, but after several weeks I don't.

  2. #12

    Join Date
    Apr 2011
    Location
    Argentina
    Posts
    18
    Yes, 4 sq. inches is 5.3 x 5.3cm.

    Ok, IŽll keep the spacing as it seems algae gets used to strong light. Maybe IŽll need to separate them a bit since I donŽt use a difusser.

    Thanks

  3. #13
    Administrator
    Join Date
    Oct 2008
    Location
    Salt Lake City, Utah, USA
    Posts
    10,566
    If growth is yellow, increasing the screen size will no help.

  4. #14

    Join Date
    Apr 2011
    Location
    Argentina
    Posts
    18
    Yesterday I moved ligh 1 inch away from the glass. Now covers all the screen.

    After 2 days of growth I saw better green growth in the borders and yellow in the center so I decreased intensity covering all the screen. I hope to see green growth now in the center .

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