Aqua Medic Easy Line Professional 200GPD For the production of soft and desalted water for salt- and freshwater aquaria, for spraying in terraria and many other applications. The easy line professional reverse osmosis units are compact and powerful and fulfill the highest demands for water quality. A sediment filter retains all particles larger than 5 µm and a carbon filter protects the membrane by removing chlorine. The module consists of a membrane, pressure pipe and flow restrictor. The membrane is the heart of the system and responsible for the pure water quality. We use the latest generation of TFC (Polyamide / Polysulfone) membranes to provide the highest quality treated water, providing a recovery ratio of approximately 3-4:1 concentrate:permeate, and a rejection rate of up to 98%.easy line professional reverse osmosis units are also ideally suited for water treatment in the household (e.g. iron, etc.).