The AquaFX TRUE 1:1 RO Membrane is designed to offer high-efficiency water filtration for saltwater aquariums and reef tanks. This membrane produces one part of purified water for every one part of waste water, making it highly efficient compared to traditional membranes that produce only one part of product water for three to four parts of waste water. It features a 98.6% stabilized salt rejection rate and is capable of operating in pH levels ranging from 2 to 12, with the ability to tolerate short-term exposure at pH 1. The membrane can handle temperatures up to 110 degrees Fahrenheit and fits any standard residential membrane housing.