Filter Carbon

[tjg2007]

How does the carbon in the filter affect planted tanks? Is it bad to keep it in there?

[gvildawg]

I don't think so but I'm no expert. Carbon pulls some of the dissolved materials out of the water.

[theotheragentm]

After a month, the carbon is no longer active and it works as a good biological filter as it has plenty of surface area. I leave mine in my cannister and will leave it there until it falls apart.