SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/fish-tank-out-of-sunlight

Where should you NOT put a fish tank?

In direct sunlight: algae grows and the water can overheat.

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  1. In direct sunlight ✔
  2. Near an electrical outlet
  3. Where you can reach it to clean

Why: Keep tanks out of direct sunlight. Sun feeds algae and can warm the water, and warm water holds less oxygen. Pick a spot near outlets that is easy to reach for feeding and cleaning.

Huh, didn't know that: A moderate amount of algae is not harmful, but too much hides health problems.

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References

Answer: In direct sunlight. Keep tanks out of direct sunlight. Sun feeds algae and can warm the water, and warm water holds less oxygen. Pick a spot near outlets that is easy to reach for feeding and cleaning.

  1. Merck Veterinary Manual (pet owners): Providing a Home for Fish www.merckvetmanual.com/all-other-pets/fish/providing-a-home-for-fish
    The tank should be located out of direct sunlight. This helps limit the growth of algae in the tank.
    Checked 2026-10-11.

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