A recycle RO system takes water from a the pond through pre-filters and through a RO system to clean the water to pure RO water.

Benefits are saving money if your on a water meter with a constant trickle in. Better recovery rates compared to a traditional RO unit run on the mains as your pond parameters come down. Also saving money on heating as your not using mains water to produce RO water which would chill the pond when your temps are higher than water Ambient temperature.