Originally Posted by sidluckman
Based on the quality of information cited in this thread, I don't think anyone should be obliged to agree to anything. I also think it unneccesary to "end a discussion" simply because you can't locate your sources.
My 'end of discussion' remark was intended for Jaysee to communicate a reluctance for further debate for the sake of argument. I saw no reason or purpose to further produce documented evidence that the earth was round, regardless of what some relatives believe.
Here are a few more examples:
Using activated carbon (charcoal) in the aquarium
Activated Carbon in the Aquarium
Using Activated Carbon in the Aquarium - Algone.com
Activated Carbon In Aquarium | Aquariums Life
Activated Carbon - The Free Freshwater and Saltwater Aquarium Encyclopedia Anyone Can Edit - The Aquarium Wiki
Perhaps these sources are all wrong and/or just copied the myth around, but nowhere do I find ANY documentation that de-adsorbtion is possible except, as you point out, in extreme cases of a pH shift so great it could not exist in an aquarium with any surviving fish.
However, before suggesting that the OP soak the carbon in vinegar, it might be better to just throw it out and start fresh.
Or better still... don't use it at all or certainly don't use it regularly. It is understood that activated carbon removes impurities. But it doesn't discriminate and some 'impurities' (including dissolved organics) are important elements for beneficial bacteria, plants and fish.
We might further argue that the glass box aquarium can't truly be compared to waters in nature. However, emulating and leveraging natural conditions in the aquarium would seem to result in a more healthy environment.
Okay, so you called me out and made me go back on my word. Time now to move on to more exciting topics