Boricua3205 Posted September 18, 2020 Share Posted September 18, 2020 I have a 3.5 with no filter. It does have a pump that moves water ever slow slightly up this black column and out the top but it doesn’t create much movement so I end up with the white film on the water surface. Does anyone know if someone makes a small enough foam filter for a 3.5 or has any suggestions? Link to comment Share on other sites More sharing options...
Matthew Posted September 18, 2020 Share Posted September 18, 2020 I have a Co Op Nano sponge filter in a 3 gallon with a bettafish. I took off the extender for mine as it's a 3 gallon long. It has been doing great. https://www.aquariumcoop.com/collections/sponge-filters/products/aquarium-co-op-coarse-sponge-filter Link to comment Share on other sites More sharing options...
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