ANSWERS: 1
  • Do you have a biological filter? I've kept my fish alive for over 5 years with very few water changes (maybe one per year) and it is always clear. I add water as it evaporates and worry that maybe minerals might be starting to build up over time. I dump about 10 gallons of my 50-gal tank maybe once per year and replace with fresh water. The biological filter and Pleco fish keep the aquarium clear and clean.

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