Aquasure Harmony 64K
A cheap way to get a large metered softener for a big household or very hard water. Capacity and salt use rest on the maker’s word alone.
Amazon $749.99$749.99
3.1/5
A low cost large capacity Fleck softener for big households or very hard water, for buyers comfortable with an uncertified, seller-built system.
- 64,000 grainsCapacity
- NoNSF/ANSI 44
Check price at Amazon$895
Price checked November 1, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Large resin bed lets a big household go longer between regenerations
- Metered regeneration keeps salt use tied to actual water use
- Low price per grain for a full size Fleck system
Cons
- A single 5600SXT valve can limit flow for very large homes; no flow rating is published for this size
- No published salt efficiency, warranty term or NSF/ANSI 44 certification
The AFWFilters Fleck 5600SXT family
Every AFWFilters Fleck 5600SXT model we rank, smallest first. Ratings compare each against its own size.
| Model | Capacity | Rating | Price |
|---|---|---|---|
| AFWFilters Fleck 5600SXT 32K | 32,000 grains | 3.1/5 | $785 |
| AFWFilters Fleck 5600SXT 48K | 48,000 grains | 3.1/5 | $804.99 |
| AFWFilters Fleck 5600SXT 64K (this one) | 64,000 grains | 3.1/5 | $895 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | 5600sxt64k-10 |
|---|---|
| Capacity | |
| Rated capacity | 64,000 grains |
| Resin | 2 cu ft |
| Control | |
| Valve | Fleck 5600SXT |
| Regenerates on demand | Yes |
| App or remote monitoring | No |
| Bypass valve included | Yes |
| Certification and warranty | |
| NSF/ANSI 44 | No |
Alternatives in this size
Aquasana SimplySoft 60K
A certified, salt efficient softener for a large household with very hard water that does not need high flow. Homes with many bathrooms in use at once should look for more flow.
Amazon $1,049$1,049
Tier1 Essential 64,000 Grain
A cheap large capacity softener for big households on city water, for buyers who want capacity on a budget and accept a short valve warranty.
Amazon $749$749
Compare
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