Which of these is a WEEKLY aquarium chore?

Top off water lost to evaporation (and clean algae off the glass).

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  1. Service the air pump
  2. Check the lighting
  3. Top off evaporated water ✔

Why: Each week: add water to replace what evaporated, remove algae from the glass, and clean the cover. A tank is a small, steady chore list, not a one-time setup.

Huh, didn't know that: Merck lists water changes and water tests every 2 weeks; the amount depends on how many fish you keep.

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References

Answer: Top off evaporated water. Each week: add water to replace what evaporated, remove algae from the glass, and clean the cover. A tank is a small, steady chore list, not a one-time setup.

  1. Merck Veterinary Manual (pet owners): Routine Health Care of Fish www.merckvetmanual.com/all-other-pets/fish/routine-health-care-of-fish
    Add any water needed to compensate for evaporation
    Checked 2026-10-11.

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