I've read some comments some of you have post in this thread: http
/www.fishforums.net/index.php?showtopic=139488.
Here is some interesting quotes I saw:
and
My questions now are:
1. Is there really a way to clean them efficently without replacing the carbon (some argued in the thread there is not way to clean it really)?
2. Would replacing the carbon once every few weeks (or whatever the directions say) get rid of your "good" bacteria company?
3. Because I have a whisper power filter that uses carbon is there any alternative I can taking if carbon isn't really that good for the tank?
Comments and suggestions highly appreciated.

Here is some interesting quotes I saw:
It is also important to realise carbon is an excellent medium for filter bacteria. After a few weeks, the surface of the carbon is so completely covered in bacteria that any adsorbtion properties it orginally had will have diminished almost to zero. Hence, if you want to use carbon as a chemical medium, you need to clean it and/or replace it on a regular basis (i.e., every few weeks).
and
How long carbon lasts will vary, but we're talking a few weeks, not months.
No, sunshine isn't hot enough to "repair" spent carbon. As I understand it, a hot oven breaks down the organic compounds that is stuck to the carbon particles, and also cracks the carbon, restoring its surface area.
Unless you actually need to use carbon because there are organics in the water, I personally don't think it's worthwhile. It's mostly a marketing gimmick for conning people into buying the stuff each month. There are much better options for marine tanks (e.g., skimmers) and in freshwater tanks, regular water changes will get rid of organics as well as nitrates and phosphates.
My questions now are:
1. Is there really a way to clean them efficently without replacing the carbon (some argued in the thread there is not way to clean it really)?
2. Would replacing the carbon once every few weeks (or whatever the directions say) get rid of your "good" bacteria company?
3. Because I have a whisper power filter that uses carbon is there any alternative I can taking if carbon isn't really that good for the tank?
Comments and suggestions highly appreciated.