Aging water is done typically to allow the chlorine to evaporate. It is not the best way to neutralize chlorinamine, but if you wait long enough, the chloramine will break down, too. If your tap water has chlorine in it, usually it is all gone in 24 hours (provided it is circulated). Chloramine takes considerably longer, but I can't give you an estimate on how long. I would stick with dechlorinaters (prime, stress coat or dechlor).
I think the other poster was suggesting you age the water to give yourself a chance to adjust the tap water to meet the parameters in your aquarium and prevent shocking the fish or crashing the pH, etc. If that is the use to which you would put "aging" the water, then you only need to "age" it to the point it matches the tank water.
I think the other poster was suggesting you age the water to give yourself a chance to adjust the tap water to meet the parameters in your aquarium and prevent shocking the fish or crashing the pH, etc. If that is the use to which you would put "aging" the water, then you only need to "age" it to the point it matches the tank water.