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  1. R

    How much CO2 ppm for a 40 gal tank??

    Is there a specific number I need to have in my 40 gal tank? I've herd like 25 to 30 ppm is a good level.
  2. R

    Black on edges of lwaves

    What does it mean when there's black on the edges of leaves like anubias, micro swords, ludwigia repens?? Is this a nutrient deficiency?? If so what am I low on?? Thanks everybody!!
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