Prime actually doesn't remove any chemicals, it breaks down the bond of certain chemicals, rendering the remaining components non toxic for fish.
if you have chloramine (chlorine + ammonia bonded together) in your tap water, then Prime is definitely the dechlorinator you want to use. other dechlorinators (like AquaPlus, AquaSafe, etc) will not neutralize the remaining ammonia after breaking the chlorine/ammonia bond, they will only neutralize the chlorine aspect. Prime will convert the remaining ammonia into ammonium, which is not toxic to fish like ammonia is.
the only dechlorinator i use is Prime. i won't allow anything else to treat my tapwater for my tanks here.