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I do i also believed in the bigger is better theory for all my fish tropical and marines, I've had bettas in every set up you can imagine, large community setups filtered unfiltered heated unheated tanks on there own small and up to 20 gallon, and honestly in MY experience my fighters in small unfiltered unheated bare bottomed bowls with a moss ball, have all lived longest and shown by far the best health of any setup.
This is just my experience though, im sure others have different opinions and experiences too.