are both used to describe indoor fish containers.

I propose to make them synonyms. While I think that a fish-tank describes something bigger than an aquarium, the practical difference seem to be small.

  • I would tend to agree, from a pet perspective they're probably interchangeable.
    – Joanne C
    Oct 10 '13 at 12:23
  • 1
    Which one do we want to be the synonym? This will be the one actually applied to questions.
    – Tim Post
    Oct 10 '13 at 13:05
  • 4
    'Aquarium' would be the more-likely used term in the context of this forum. Oct 10 '13 at 13:28
  • 2
    In addition to what Robert said, all fish tanks are aquariums (AFAIK) but not all aquariums are fish tanks (sometimes they hold reptiles), so if that distinction ever matters then aquarium should be the main tag. Oct 10 '13 at 16:40
  • aquarium-fish, aquarium-reptile
    – JoshDM
    Oct 16 '13 at 4:20

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