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Chalky Leaves - Due to Too Much Light? Not enough Ferts?

Discussion in 'CO2 Enrichment' started by PhillyB, Sep 14, 2008.

  1. PhillyB

    PhillyB Prolific Poster

    Joined:
    Dec 27, 2006
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    Local Time:
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    All,

    I have been running a few tanks pretty successfully. I have a 29 gallon (Excel) and a 20 gallon (Non-CO2). Both tanks have Lobelia Cardinalis (Cardinal Plant). The ones in the 29 gallon develop very chalky leaves, whereas the 20 gallon plants are growing very nicely and fully green. Any suggestions on the issue?

    A photo...
    http://pic50.picturetrail.com/VOL416/8637283/16014295/334509560.jpg

    [​IMG]

    My specifications:
    29 Gallon
    1x per week: 1/4 tsp Potassium Nitrate, 1/16 tsp Mono Potassium Phosphate, 1/8 tsp Potassium Sulfate, 1/2 tsp Calcium Sulfate, 1/4 tsp Magnesium Sulfate.
    1x per week: 5ml of TMG
    Daily: 2.5 ml of Excel (15ml @ water change)
    75% water change 1x per week
    65 Watts of PC Lighting (6 inches above water) + 8 hour photo period
    Fluorite substrate

    20 Gallon
    About every 3 weeks: 1/4 tsp Potassium Nitrate, 1/16 tsp Mono Potassium Phosphate, 1/8 tsp Potassium Sulfate, 1/2 tsp Calcium Sulfate, 1/4 tsp Magnesium Sulfate.
    1x per week: 2.5ml of TMG
    Onyx Sand + Leonardite Substrate
    36 Watts of PC Lighting + 8 hour photo period
     
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