All Seas Marine Inc SLB Splmt Replenisher 2# 24BLK

Automatically 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.