I run carbon only occasionally, about a week to 10 days per 6 weeks or so. I also run poly filters, which augments the chemical filtration of my system.
Yup, usually a month or until the flow has slowed up significantly and that can vary from two to four weeks for any of us. So just keep an eye on the output of your filter.
I said longer than 4 weeks since it's in the reactor with my phosban, and only gets changed when the phosban needs changing. So I guess technically I only run carbon part time
BTW, who changes their carbon every three days? :rollface:
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