The AquaFX 500 GPD Membrane is a high-performance reverse osmosis membrane designed to provide exceptional water purification for saltwater aquariums. Rated at 500 Gallons per Day, this membrane acts as the primary barrier against dissolved salts, inorganic molecules, and organic contaminants, ensuring only the purest water enters your reef system. It serves as a direct replacement component for AquaFX Blue Fin and Blue Fin PRO RO/DI Systems, crucial for maintaining optimal water quality.

This advanced membrane boasts a 98.6% stabilized salt rejection rate, effectively removing up to 99% of a vast array of impurities including Calcium, Sodium, Magnesium, Nitrates, Phosphates, Silica, Heavy Metals, and even bacteria. It operates efficiently within a pH range of 2 to 12, tolerating a pH of 1 short-term, and can handle temperatures up to 110 degrees F, though it is not chlorine tolerant. Optimal output is achieved under specific conditions of 65 PSI, 77°F, and 250ppm TDS input water.

Ideal for serious reef aquarists and those with larger systems, the AquaFX 500 GPD Membrane ensures a consistent supply of ultra-pure water, essential for mixing saltwater, topping off evaporation, and maintaining a stable, healthy reef environment. Its high output capacity minimizes wait times for water production, providing convenience and peace of mind for hobbyists who demand the highest standards of water purity for their delicate aquatic ecosystems. A booster pump is highly recommended for feed pressures below 45 PSI to maximize performance.