Who Gives A Fish Forums

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.

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.

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.

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

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

seabird wrote: ↑Wed May 07, 2025 9:46 pm 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.