Ideal for reef and saltwater aquariums. Make perfect water for planted freshwater aquariums. Removes calcium, magnesium, sodium, potassium, sulfate, chloride, carbonate, copper, zinc, lead, nitrate, etc. as tap water . Tap Water Filter Unit, Four-Ounce Bottle Electro-Right, Four-Ounce Bottle Ph Adjuster, Universal Faucet Adapter, Kink-Free Tubing, Resin Compression Spring.