The Two Little Fishies MetaSorb UHC is a specialized filter media designed to address the issue of heavy metals in saltwater aquariums. Heavy metals can originate from various sources such as water, food, and artificial seawater mixes, posing significant risks to marine life by causing sudden health issues when levels become toxic. This product utilizes patented high-capacity polymers originally developed for the US Environmental Protection Agency's Superfund Program, making it highly effective at binding and permanently removing a wide range of metals from both freshwater and saltwater environments. The MetaSorb UHC comes in a fine powder form packaged inside a small cloth media bag that can be easily placed within any filter system to facilitate metal removal efficiently.