Filter stops at 3 AM nightly

[vimster]

Also, check the O-rings. If they're worn out, the filter might lose prime and shut off. Had that happen with my old canister.

[seabird]

Good call on the O-rings. Mine were shot after a year. Replaced 'em and it ran like new. Cheap fix if that's the issue.

[blazekid]

If none of that works, might be time to hit up Fluval's customer service. They're pretty chill about replacements if it's under warranty.

[duskore]

I recommend keeping a log of when the filter stops. This can help identify any patterns or external factors causing the issue.

[Lorena]

Another thought: is the filter near a window? Temperature drops at night might be affecting it. Just a wild guess.

[lowpath]

Good call on the O-rings. Mine were shot after a year. Replaced 'em and it ran like new. Cheap fix if that's the issue.

Yep, O-rings are often overlooked. Cheap and easy to replace, too.