want to know who still runs carbon in there filters on fish only tanks. curious if its still just as important as running it in freshwater tanks. i need to replace mine be awhile. how long does carbon last? i hard like a month- is that true?
I run carbon constantly. In both my tanks (125 & 55) both reefs. I love the stuff and would never stop using it because both of my tanks are thriving. Sure I've lost fish here and there, but in no way was carbon a factor. I change it every three weeks. Some say change it once a month, while others say two weeks, so I split the difference.