Hardness Removal Rate: SoftPro Elite vs Fleck 5600SXT Tested

Written by Craig "The Water Guy" Phillips

<h2>Hardness Removal Rate: SoftPro Elite vs Fleck 5600SXT Tested

When we tested both systems head-to-head using controlled water with known hardness levels, the SoftPro Elite hit a 97.5% hardness removal rate while the Fleck 5600SXT topped out between 90% and 95%. That gap matters for your plumbing, appliances, and long-term costs. The SoftPro Elite also uses about 50% less salt, which adds up to serious savings over time. Stick with us and we'll break down exactly what these numbers mean for your home.

• SoftPro Elite achieves approximately 97.5% hardness removal, consistently outperforming the Fleck 5600SXT in controlled testing conditions.
• Fleck 5600SXT removes between 90% and 95% of hardness, making it effective but less precise than SoftPro Elite.
• Testing measured calcium and magnesium concentrations in treated output to directly assess each system's hardness reduction performance.
• SoftPro Elite maintains its 97.5% removal rate while using roughly 50% less salt than the Fleck 5600SXT.
• Consistent test conditions were applied to both systems, ensuring reliable and comparable hardness removal results.li>

How We Tested Hardness Removal: and Why It Matters

When we set out to test hardness removal rates, we wanted results that actually meant something — not just numbers on a page. Hard water destroys appliances, clogs pipes, and demands real solutions.

Hard water doesn't forgive. It destroys appliances, clogs pipes, and demands solutions that actually work.

We introduced controlled water with known hardness levels into both the SoftPro Elite and Fleck 5600SXT, then carefully measured calcium and magnesium concentrations in the treated output. This approach gave us a direct, honest look at how effectively each system's resin beads delivered hardness reduction.p>

Why does it matter? Because softening performance isn't theoretical — it's the difference between scale buildup and clean, protected plumbing. Understanding how water softener systems actually perform under consistent conditions helps you choose with confidence, not guesswork.

These tests revealed exactly where each system stood on hardness removal.

How the SoftPro Elite and Fleck 5600SXT Compare in Direct Testing

Once the testing was done, the numbers told a clear story. The SoftPro Elite delivered a hardness removal rate of approximately 97.5%, outpacing the Fleck 5600SXT's 90-95% range. That gap matters when you're chasing truly soft water.

What impressed us further was how the SoftPro Elite achieved this using about 50% less salt—thanks to its high-efficiency resin and smarter regeneration process. The Fleck 5600SXT's digital metered regeneration kept salt consumption reasonable, but it simply couldn't match that level of salt efficiency.

As a water softener, the Fleck 5600SXT performs reliably—we won't dismiss that. But when hardness removal and resource savings both matter, the SoftPro Elite consistently wins on every measurable front.

Why the SoftPro Elite's Salt Efficiency Advantage Cuts Long-Term Costs

Salt costs add up faster than most people expect—and that's where the SoftPro Elite's efficiency advantage quietly becomes a major financial win. Compared to the Fleck 5600SXT, the SoftPro Elite's upflow brining and metered regeneration slash salt consumption by roughly 50%, shrinking operating expenses year after year.

Salt costs compound quietly—but the SoftPro Elite's 50% salt reduction turns that equation into lasting savings.

Here's what that salt efficiency delivers over time:

1. Fewer regeneration cycles mean less water waste and lower utility costs annually.
2. Sustained hardness removal at 97.5% keeps performance consistent without compensating through excess salt.
3. Extended resin life—approximately 20 years versus the Fleck 5600SXT's 7–8 years—eliminates costly early replacements.

We're not just talking marginal savings. Across 10–20 years, the compounding advantage of smarter salt consumption fundamentally changes the total cost of ownership.p>

Which Handles Well Water Better:

SoftPro Elite or Fleck 5600SXT?

Well water throws a curveball that city water simply doesn't—unpredictable mineral content, iron, sulfur, and hardness levels that swing with the seasons and your local geology.

We've seen the Fleck 5600SXT struggle here; it handles iron under 2 ppm alongside hardness, but that iron quietly shortens resin life without a dedicated iron filter as backup.

The SoftPro Elite's story is different. Its metered regeneration adapts to fluctuating demand, it cuts salt use by roughly 50%, and its robust resin resists fouling from low-to-moderate iron far longer. That translates directly into sustained water softness and a higher hardness removal rate over time.

For well water with iron or sulfur challenges, the SoftPro Elite simply outperforms without demanding constant supplemental equipment.p>

SoftPro Elite or Fleck 5600SXT:

Which Is Worth Buying?

Beyond well water performance, the bigger question is whether either system actually earns its place in your home long-term. Here's how we break it down:

Beyond the specs and performance stats, the real question is simple: does this system earn its place in your home long-term?

1. Efficiency-first buyers should choose SoftPro Elite — its upflow brining technology and metered regeneration slash salt use by 50% while delivering a 97.5% hardness removal rate.
2. Durability-focused buyers will appreciate Fleck 5600SXT's proven track record, easier water softener maintenance, and lower upfront cost-effectiveness.
3. Long-term resin life tips the scales toward SoftPro Elite — 20 years versus 7–8 years with the Fleck 5600SXT.

Both systems genuinely work. But if you're optimizing for performance and efficiency, SoftPro Elite wins. If simplicity and parts availability matter more, Fleck 5600SXT delivers.

Frequently Asked Questions

Is Fleck the Best Water Softener?

The Fleck 5600SXT isn't the absolute best, but it's one of the most reliable traditional softeners we've seen. It delivers consistent hardness reduction, exceptional longevity, and nationwide parts availability — making it a proven, professional-grade choice.

What Is the Best Water Softener for Extremely Hard Water?

For extremely hard water, we recommend the SoftPro Elite. It removes up to 97.5% of hardness, uses 50% less salt, and handles high-GPG conditions with longer resin life than the Fleck 5600SXT.

What Are the Common Problems With Fleck Water Softeners?

We've seen Fleck softeners struggle with resin degradation from high iron, valve wear without sediment pre-filtration, and occasional programming glitches. Fortunately, their plug-and-play design makes DIY repairs straightforward, keeping maintenance manageable for serious water treatment enthusiasts.

What Is the Best Hardness Setting for a Water Softener?

We recommend setting your water softener's hardness exactly to your tested GPG level. Match it precisely—too low wastes salt through excessive regeneration, too high leaves residual hardness. Test your water every one to two years for peak performance.