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substrate gravel rotting

  1. Substrate
    So here's the issue: I have a 2.5 gallon planted nano with nothing but two grades of plain gravel for substrate. I didn't quite know what I was doing when I set it up; it's been a learning process. The bottom 2/3rds of the substrate are gravel that's about 3/8" and the top gravel is a bit...
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