Aquamira Series II GRN LINE Replacement Filter

Continue to use your Frontier Flow bottle for outdoor recreation with a Frontier Series II GRN Line filter. This filter is certified to remove bacteria, Cryptosporidium, and Giardia to EPA standards. It also reduces chemicals, chlorine and taste and odor and is certified lead free to NSF/ANSI-372. Add an additional 100 gallons of removal capacity to your pack with perfect fit and connectivity.
Calculated at checkout

Use the Series II GRN Line Bacteria Filter with your Frontier Flow Water Bottle to protect your thirst as you travel across the back roads of America, to the heights of Everest, or to your next 9-to-5 meeting. The GRN Line Bacteria Filter provides cost-effective protection for recreation and use with backcountry water sources where viruses are not a concern.

Product Features

    GRN Line Bacteria Filter with up to 800 ml/minute flow rate
    Miraguard™ Antimicrobial* Technology suppresses the growth of bacteria, algae, fungus, mold and mildew within the filter media
    Filters 100 gallons
    BPA free, chemical free, and iodine free
    Filter made in the USA


GRN LINE Bacteria Protection

Bacteria Removal ≥ 99.9999%
Cyst Removal     ≥ 99.9%
Meets or Exceeds ANSI/NSF 53

Chlorine, Taste & Odor Removal
Meets or Exceeds ANSI/NSF 42

Frontier GRN Line Protection is achieved using Electro-Positive Absorption Technology. Charged micro-glass fibers “pull” organisms as small as bacteria out of the water stream while still maintaining high flow rates and low pressure drops, making Frontier Series II GRN Line Bacteria Filters the perfect choice for water bottle, pump and gravity flow applications. Frontier Series II GRN Line Bacteria Filters have been thoroughly tested by independent laboratories and are proven to consistently remove protozoan cysts and bacteria to ANSI/NSF Standard 53 and US EPA standards without the use of disinfecting chemicals such as chlorine, bromine, or iodine. The addition of sub-micron carbon particles into the filter media increases the absorptive capability required to reduce chlorine and harmful chemicals, bad tastes, and odors. Frontier Series II GRN Line Bacteria Filters provide superior biological protection, high flows, and long service life in a compact, lightweight, and easy to use capsule.

Frontier Series II capsule was developed by our engineers to provide the easy and secure connections with minimum fuss and fittings. Frontier Series II Bacteria Filters connect easily to any Frontier water bottle cap with a simple “push and twist.” They also connect directly to 1/4″ tubing for “in-line” gravity flow and hydration applications.


    Frontier™ Flow GRN Line Filtered Water Bottle
    Frontier™ Flow RED Line Filtered Water Bottle

Perfect For


*Miraguard does not protect users against food borne or disease causing bacteria, viruses, germs or other disease causing organisms.


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