Actually removing hardness (a softener, not a filter)
Aquasure Harmony 48,000-Grain Softener
Whole-house salt-based water softener by Aquasure · No system certification
$630
At aquasureusa.com · checked October 23, 2026. Installation is extra - see the quotes guide for typical installed costs.
Check current price at Aquasure
Our verdict
Included because half of 'whole-house filter' shoppers actually have a hardness problem. If your issue is scale on fixtures and water spots, this - not a carbon tank - is the tool, and at this price it is the value pick of the softeners.
Specifications & certification
| Type | Whole-house salt-based water softener |
| How it works | A metered, digital-head ion-exchange softener that regenerates automatically on demand. Pair it with a carbon system: softeners fix scale, spotting and soap scum - filters fix taste and contaminants. Different jobs. |
| Certification status | Aquasure publishes no NSF/ANSI claim on this product page. Note the category truth: a softener exchanges calcium and magnesium for sodium - it does not filter contaminants, and no certification is needed to say so honestly. |
| Capacity & flow | 48,000 grains; up to 12 GPM |
| Maintenance | Salt refills for the brine tank (interval depends on hardness and usage) |
| Installation | Needs a drain and a 120V outlet; DIY or professional install |
| Warranty | Aquasure's pages conflict (2-year site statement vs 5-year manual on registration) - confirm at purchase |
What it claims to reduce
Aquasure's own published figures, graded by the certification status above.
- 48,000-grain capacity between regenerations
- Rated for 4-5 bathroom homes (Aquasure)
Buying through a dealer instead?
Culligan, Kinetico and EcoWater don't publish prices. Walk in knowing the ranges and the questions.