Water filter costs checked daily: what each gallon of filtered water costs you | CentsPerGallonSystem prices, replacement filter prices, rated capacity and the certification wording for whole-house, reverse osmosis, under-sink, gravity, pitcher and shower filters, read from each brand's own store every day.https://centspergallon.com/Aquasana Claryum 2-Stage Under-sink 2-stage, system price: $249.99 to $124.99 (-50%)https://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-claryum-2-stage-under-sink-2-stage-system-pricehttps://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-claryum-2-stage-under-sink-2-stage-system-priceAquasana Claryum 2-Stage Under-sink 2-stage (system price) moved from $249.99 to $124.99 on 2026-10-23; the old price was last seen on 2026-10-22. Source: https://www.aquasana.com/under-sink-water-filters/claryum-2-stage/brushed-nickel-100391677.html. <a href="https://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-claryum-2-stage-under-sink-2-stage-system-price">See it in the daily log at https://centspergallon.com/data/filter-costs/</a>Fri, 23 Oct 2026 12:00:00 GMTAquasana Claryum 2-StageAquasana SmartFlow RO Under-sink RO with tank, system price: $449.99 to $224.99 (-50%)https://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-smartflow-ro-under-sink-ro-with-tank-system-pricehttps://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-smartflow-ro-under-sink-ro-with-tank-system-priceAquasana SmartFlow RO Under-sink RO with tank (system price) moved from $449.99 to $224.99 on 2026-10-23; the old price was last seen on 2026-10-22. Source: https://www.aquasana.com/reverse-osmosis-water-filters/smart-flow-reverse-osmosis/chrome-100385796.html. <a href="https://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-smartflow-ro-under-sink-ro-with-tank-system-price">See it in the daily log at https://centspergallon.com/data/filter-costs/</a>Fri, 23 Oct 2026 12:00:00 GMTAquasana SmartFlow ROAquasana Rhino Whole house, 10-year tank, system price: $1,998.00 to $999.00 (-50%)https://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-rhino-whole-house-10-year-tank-system-pricehttps://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-rhino-whole-house-10-year-tank-system-priceAquasana Rhino Whole house, 10-year tank (system price) moved from $1,998.00 to $999.00 on 2026-10-23; the old price was last seen on 2026-10-22. Source: https://www.aquasana.com/whole-house-water-filters/rhino-100365488.html. <a href="https://centspergallon.com/data/filter-costs/#change-2026-10-23-aquasana-rhino-whole-house-10-year-tank-system-price">See it in the daily log at https://centspergallon.com/data/filter-costs/</a>Fri, 23 Oct 2026 12:00:00 GMTAquasana Rhino