We are the trusted RO drinking water and aquarium membrane experts since 1982! Our team focuses on providing quality RO membranes for drinking water and aquarium membranes alike. Our team prioritizes quality and reliability when it comes to providing clean drinking water through reverse osmosis systems and maintaining optimal conditions for aquariums.

We achieve this by utilizing top-notch Axeon and Dow Filmtec membranes in every system. Questions about our RO membrane products? Please contact us at, or call us at (772) 461-0256.

    Product type

    Reverse Osmosis Aquarium Membranes

    Why choose RO drinking water membranes or aquarium membranes from Air, Water & Ice? Here are just some of the key points to understand about these RO membranes and why you should consider investing in them:

    Variety of GPD Options

    Our range includes 50, 75, and 100 GPD (gallons per day) Dow Filmtec membranes, which are specifically designed to operate at 50 PSI (pounds per square inch) pressure. The average PSI in U.S. homes is 65, showcasing the effectiveness of our systems even under less-than-optimal pressure conditions. Our Axeon 150 GPD membranes, rated at 65 PSI, provide even higher water production rates.


    With proper maintenance, our drinking water membranes/aquarium membranes typically have a lifespan of 3 to 5 years. Regularly changing prefilters at least once a year is important for ensuring optimal membrane performance. In cases where prefilters are neglected, RO membranes may last around 1.5 to 2.5 years, depending on usage levels.

    Aquarium Membrane Replacement

    In the context of aquariums, we recommend replacing membranes when they fall below a 90% rejection rate. This ensures that your aquatic environment remains pristine and free from contaminants. Contact our team with questions relating to RO membrane replacements.

    TDS Testing

    To determine the efficiency of your system and whether RO membrane replacement is necessary, we recommend performing a Total Dissolved Solids (TDS) test. This straightforward process can help you assess water quality accurately.

    By prioritizing the quality of our RO drinking water membranes and offering guidance on maintenance and testing, we ensure that our customers have access to clean and safe drinking water and maintain ideal conditions for their aquariums, working to promote the well-being of both humans and aquatic life.

    Our RO Aquarium Membrane & Drinking Water Membrane Products

    Filmtec Membranes

    Looking for the correct gallons per day and level of PSI for your system? Air, Water & Ice has several options available. This includes our Filmtec Membrane 50 GPD, which fits most RO systems. The 50 GPD membrane consists of a TFC thin film composite membrane with a 99% rejection rate, which is meant to be used along with the 550 fast flush flow restrictor. We also have the Filmtec Membrane 70 GPD, which is similar, but with a much improved rejection rate at 99% at 50 PSI.

    If you're looking for an even more powerful reverse osmosis membrane product, we also offer the Filmtec Membrane 100 GPD, which boasts an extremely HIGH rejection rate, and should be used with the 1000 fast flush flow restrictor. Lastly, we have the Axeon 150 GPD Membrane with a 98% rejection rate, high output, and superb TDS rejection. You'll need to use a 1100 fast flow restrictor with the 150 GPD membrane.

    Membranes & Filter Pack

    Need a replacement? Air, Water & Ice also has two replacement Merlin membranes and filter packs for your Merlin unit, and also a 17" carbon prefilter. If you have questions or need assistance with your RO aquarium or drinking water membrane products, please don't hesitate to give Air, Water & Ice a call.

    Shop RO Drinking Water Membranes & Aquarium Membranes

    Founded in 1982, the Air, Water & Ice team has dedicated a great deal of time and energy perfecting products and services for drinking water RO membranes/aquarium membranes, RODI and RO systems, DI Resin products, water filters, pumps, water testing products, and more. We are a trusted online resource for various different types of drinking water and aquarium products for better, cleaner, and faster access to water!

    Have questions about RO aquarium or drinking water membranes? Please direct them to our team at or call us at (772) 461-0256, and our team will be in touch!