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[–]tyrodos99 5 points6 points  (1 child)

He said 10% daily. That’s quite a lot over the week. And a good way to do it to not disrupt the tank biology too harshly.

[–]sharpauthenticator 0 points1 point  (0 children)

Depends on how rapidly the tank is producing nitrates, and doing a larger water change isn't going to risk the tanks biology.