Nearly all pet aquatics companies manufacture a product that removes chlorine. None of those, however, can compare in quality, concentration, or effectiveness to Seachem’s flagship product: Prime®. Prime® is the complete and concentrated conditioner for both fresh and saltwater. Prime® removes chlorine, chloramine and detoxifies ammonia, nitrite, and nitrate. It is non-acidic and will not impact pH. A further bonus for the reef hobbyist—Prime® will not over-activate skimmers.
Prime® may be used during tank cycling to alleviate ammonia/nitrite toxicity. It contains a binder which renders ammonia, nitrite, and nitrate non-toxic, allowing the biofilter to more efficiently remove them. It will also detoxify any heavy metals found in the tap water at typical concentration levels. Use when setting up a new aquarium and whenever doing a waterchange. When transporting or quarantining fish, use Seachem StressGuard™. When adding new fish, use with Brightwell Aquatics Microbacter7. Both are ideal for use with Prime®.
 
Because it is so concentrated, you do not need to use a lot and thus will last a while. We use Prime® to dechlorinate water here at Atlantic Aquariums!