Sea Lab #28 Automatic Replenisher 24 Blocks | 2 lb Box | Sea Lab

This product automatically controls concentrations of 28 elements, including calcium, strontium, and essential trace elements, to maintain aquarium pH and remove heavy metals.

• The description claims that the product maintains natural ocean concentrations of calcium, strontium, and all 15 essential trace elements.
• The description claims that the product helps to buffer aquarium pH and removes heavy metals, ammonia, and phosphate.