[krisha]

....think i read somewhere that a carbon filter will drive out CO2 and ferts - am i right?

 

[Seattle_Aquarist]

Hi krisha,
Yes, activated carbon will absorb gasses (including CO2) and impurities (including ferts) from the water.

 

[krisha]

cheers - guess i'll remove it from my new tertatec filter.

 

[trenac]

You can however use carbon in a newly setup tank, when removing meds or discoloration from water. Carbon will run it's course within a few weeks & be useless anyways except for biological filtration.

 

[supersmirky]

however, over time it can leach what it had previously absorbed

 

[houseofcards]

I've always had carbon as one of the five important components of a successful algae free setup.