The water supply in my area is treated with chlorine rather than chloramine. I have read that chlorine will dissipate on its own if the water is left standing. Is it better to just add water right from the tap and treat with Prime or other dechlorinator, or should I let the water sit in a holding vessel with an airstone for a day or so to let the chlorine dissipate naturally? I know tons of people use dechlorinators with no problems, but I tend to feel that it would be better if it can be done without chemical additives. Is it worth the extra hassle? Would a brand-new standard plastic trashcan be suitable for this purpose? I will be keeping SA cichlids, btw.