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#1
03-16-2015, 12:27 AM
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When using hang on back filter how often do you change the replaceable filter? the one with carbon stuff in it? I know not to touch the bio filter.
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#2
03-16-2015, 12:49 AM
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The carbon has a very limited effective lifespan. After a week it does very little but still works to some degree for another couple of weeks. I would personally change the filter every 3-4 weeks but rinse it out with each water change. If I understand you correctly you are using the type of filter pad that has the carbon and filter pad as a single disposable unit. If you have one with a sponge and carbon separate then just replace the carbon and rinse out the sponge as the sponge will last a very long time.
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#3
03-17-2015, 11:41 PM
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Thank you!!
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