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  1. pH for tropical fish
  2. Red Algae
  3. theres a 'slick' on the surface of my freshwater nano tank.
  4. Tannins
  5. will carbon get rid of copper?
  6. ph adjusters
  7. cycling problems and calcium supplement.
  8. high phosphates?
  9. milky water !!!?
  10. Does chlorine disappear in water that is left to stand?