pjb9166

Hi everyone

Question about carbon in planted tanks?
To use or not and why?

Thanks
Paul

pjb9166

I guess that isn't a good question.
I'm asking this because i am wondering if carbon in the
filter will effect liquid ferts.

davemonkey

Carbon is beneficial at first to absorb excess ammonia or other pollutants, but it is not necessary if the tank is very heavily planted. After a tank has established, it's not generally recommended. You also don't want to keep old carbon in the filter for an extended period (months or longer) because it will gradually begin to release the pollutants that it has absorbed. I don't think there are many formal studies on whether or not it will absorb fertilizers for the plants...but I don't think it would have much affect (just guessing though).

pjb9166

Thanks.
The carbon has only been in the canister for about two weeks.