The Pearl PLUS model has a much stronger signal than the Pearl. While both units consume 1.2W of power, the Pearl PLUS delivers a signal that is 50 times more powerful, making it suitable for tackling harder water in larger homes (up to 3,000 sq ft) with bacteria issues. This increased power allows it to effectively condition water in larger systems and address the effects of harder water, while also having the capability to combat various forms of bacteria present in water from wells, cisterns, and lakes.