Carbon will only leech things back into the water if something in the water has more affinity for the carbon than what is already bound to it. Think of it like this: Carbon has absorbed X, Y and Z so that it has no more absorption ability. Carbon will not release X, Y, or Z when full it will simply not absorb anymore new XYZ. Now, if say you treat with medicine A that binds more strongly to carbon it can knock off XYZ leeching XYZ back into the water.
|