Temperature fluctuations
My tank starts at about 72F on colder mornings and on hot evenings (when the heating's been on or one of us has been working a while in the study), it gets up to 80F.
When I do water changes I make sure I get my new water to the same temp and the tank, but is it stressful for my fish when it keeps peaking at 80F each night?
(they're all Neon Tetra and Harlequin Rasbora, so like it around 76F)
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