What is this component called and should I replace it?

Jayhawk29

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Hello,

I have a 10g freshwater tank with a power filter. My question is: what is the sponge piece at the bottom of the filter where the water comes out called? Mine is pretty soggy and just COVERED in algae. Should I replace it or is it best to leave it for the good bacteria on it?
Thank you.
 

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Betta'sAnonymous

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When you do a water change, rinse that piece in the bucket of old tank water. Might have to scrape the algae and stuff off with your fingers. Should be able to keep most of your good bacteria that way.
 
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Jayhawk29

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Thank you. So it actually didn’t have much algae on it. It’s just brown from being used for so long. Is this not an issue? Keep using it?
 

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