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proper co2 levels
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  1. Fertilizers and Water Parameters
    1. Can Seachems Excel be used with 4-5 watts per gallon lighting? 2. How do you check co2 levels? 3. If the Excel is not enough to supply propper amounts of co2 under high lighting conditions can it be supplemented with the old 2liter bottle with yeast and sugar water? (D.Y.I. co2 system)
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