Sounds like you have the bio cube filter.. I have the same setup.. I merely rinse the filter once or twice per week, depending on how dirty it is.. I replace it with a new one every month as it has activated charcoal and it gets old. I also rinse out the sponge between chamber 2-3 every month. I’m happy with the setup , I keep mostly corals and a few fish. I haven’t killed anything yet, although my Montipora mystic sunset is struggling somewhat.I have a 32g nano, how often do I change out filter?it looks dirty every week
What would you use instead of bio balls or ceramic tubes?I’d rinse any mechanical filtration in the water you take out during water changes every time you do one. Carbon every 3-4 weeks. If you have something intended for bio filtrationlike bio balls or ceramic tubes I’d personally get rid of them otherwise rinse like mechanical filtration. Other chemical filtration I’d change every 3-6 weeks.