Sea Lab #28 Replenisher 2 lb. Box

Sea Lab #28 Replenisher 2 lb. BoxAutomatically controls concentrations of 28 elements including calcium, strontium and all 15 essential trace elements.Removes heavy metals and limits ammonia and phosphate while helping to buffer aquarium pH. Available in: 1/2 lb Container (as pictured) The 1 kg. block treats over 100 gallons. Block box contains 24 Blocks (2 LBS) Saltwater use only.