laritheloud Posted December 8, 2021 Share Posted December 8, 2021 I ordered a new small sized sponge filter for my 20 gallon quarantine to work in addition to an HOB... And when I placed it into the tank, it floated. 😳 I have Aquarium Co-op sponge filters in all of my tanks and this is the first time I've had a problem with floating. Did anyone else have this issue?? Can I fix it with anything other than wedging it in with a decoration? Link to comment Share on other sites More sharing options...
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