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co2 needed

  1. Plants
    I just put in about 8 plant in my 30gl tank i have 2 t5 bulbs running about 10-12 hours a day and about 6 glo-fish and 2 guppies and a few goldfish and i'm wondering if the fish I have will output enough CO2 for my plants to survive I also feed my plants about once a week with "leaf zone" liquid...