Samanthabea Posted April 19, 2021 Share Posted April 19, 2021 The white stuff is powdery I've never had a sw or canister before so I'm not sure I was rinsing my filters for the 1st time(new tank) it's also in the job is that normal honestly never had an issue with white powdery accumulation in filters beside hard water in fw tanks Link to comment Share on other sites More sharing options...
Streetwise Posted April 19, 2021 Share Posted April 19, 2021 Are ceramic rings or spheres part of your filter media? They can leave some dusty debris. Link to comment Share on other sites More sharing options...
Samanthabea Posted April 20, 2021 Author Share Posted April 20, 2021 Ya must not have rinsed them good enough Link to comment Share on other sites More sharing options...
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