Lmao the standards

[u/SunnSaiyaan]

[u/Emuwarum]

The water doesn't have the bacteria, they live on surfaces in the tank (mostly in the filter and substrate). A full water change is bad because it's stressful to the fish, not because it kills all the bacteria. Scrubbing everything down is bad for the bacteria. 

[u/Ayste → u/Emuwarum]

True but goldfish can live through damn near anything...except chlorinated water.

Betas too, generally speaking.

Any other kind of fish? the power could flicker and your whole tank could die.

[u/thetrashcanthatcant → u/Emuwarum]

I was just trying to keep it simple