HydroLogic - Stealth RO 100/200 Membrane

High-performance replacement membrane for HydroLogic Stealth-RO 100 and 200 reverse osmosis systems. Engineered for hydroponics, aquariums, and reef tanks, this TFC (Thin Film Composite) membrane delivers up to 98+% PPM rejection to ensure ultra-pure water for optimal plant growth and sensitive aquatic life.

Key Features

• Up to 98+% PPM Rejection – Removes dissolved solids, chlorine, and contaminants
• 100 GPD Capacity – Filters up to 100 gallons per day at rated conditions
• 2 GPM Flow Rate – Efficient water production for grow rooms and aquariums
• 6 Month to 2 Year Lifespan – Depending on source water quality and usage
• Compatible Models – Designed for Stealth-RO 100 and 200 systems

When to Replace Your Membrane

1. Rejection Rate Drops Below 90% – Test your RO output vs. inlet water. If rejection falls below 90%, it's time for a new membrane.
2. Significant Flow Reduction – If product water slows down after replacing pre-filters, the membrane needs replacement.

Performance Notes

RO output depends on source water temperature. At 77°F, the system produces up to 100% of rated output. Performance varies with temperature changes. For temperature-corrected flow rates, consult the HydroLogic TFC chart.

Flow rates based on source water @ 65 psi / 77°F / 500 ppm

Model: HL#22120