Direct answer: HALO 5 filters and conditions water; it does not remove the calcium and magnesium measured by a hardness test. CK10 is a salt-regenerated ion-exchange softener. HALO Hybrid combines carbon filtration and ion-exchange softening in one treatment tank, with a separate brine tank. If your goal is a lower measured hardness result, compare CK10 or Hybrid. If you want filtration without salt, HALO 5 is the different treatment to evaluate. HALO also offers a HALO 5 plus CK10 combination.
Publisher boundary: Water System Guide is an independent research publisher, not a HALO dealer or installer. We reviewed manufacturer documents for this comparison; we have not independently tested these systems. A manufacturer’s treatment claim is not a guarantee of results in your home.
Compare the treatment before the tank size
| Question | HALO 5 | CK10 | HALO Hybrid |
|---|---|---|---|
| Main treatment | Multimedia filtration plus HALO ION conditioning | Ion-exchange softening | Carbon filtration plus ion-exchange softening |
| Removes hardness minerals? | No; minerals remain in the water | Yes, through ion exchange | Yes, through ion exchange |
| Salt and brine tank? | No for a standalone HALO 5 | Yes | Yes, even though filtration and softening share one treatment tank |
| What to verify after installation | The filtration result you bought it for | Inlet versus treated-water hardness | Hardness and the filtration result, separately |
| Equipment layout to identify | HALO 5 tank and inline conditioner | Softener tank and salt/brine tank | Combined treatment tank and salt/brine tank |
These distinctions come from HALO’s HALO 5, CK10 and Hybrid descriptions. The HALO FAQ explicitly says conditioned water will still test hard. A HALO 5 paired with CK10 is a different installation from HALO 5 alone: HALO’s softening combo includes both.
That makes a useful first question for a quote: Are you selling me filtration, conditioning, hardness removal, or a combination? Have the installer identify which component performs each job. The phrase “HALO system” is too broad to answer that question.
What the current model sheets actually say
The current CK10 sheet lists three models. The Hybrid sheet lists H-HYBRID.
| Model | Treatment tank | Brine tank | Published peak flow |
|---|---|---|---|
| H-CK10-150 | 10 × 54 inches | 18 × 36 inches | 14 gpm |
| H-CK10-200 | 12 × 52 inches | 18 × 36 inches | 16 gpm |
| H-CK10-250 | 13 × 54 inches | 18 × 36 inches | 18 gpm |
| H-HYBRID | 13 × 54 inches | 18 × 36 inches | 18 gpm |
Those are manufacturer peak-flow figures, not a demonstration that Hybrid and CK10-250 have equal hardness capacity or salt efficiency. Ask for the usable grain capacity at the proposed salt dose and the rated service flow for the exact configuration. We do not substitute a control valve’s maximum flow for a whole system’s treatment rating. For sizing within each family, see CK10-150 vs 200 vs 250 and HALO 5 sizes compared.
The 2026 HALO 5 sheet describes a different capacity: H5-100 at 1 million gallons, H5-125 at 1.5 million and H5-150 at 2 million, based on chlorine reduction with 1 ppm incoming chlorine. Those gallons are not softening capacity in grains. The sheet also says conditioning results may vary above 25 grains per gallon of hardness. Treat that as a reason to discuss your measured water with HALO, not a promise that every installation below that number will perform identically.
Certification language needs a specific scope
HALO’s current HALO 5 sheet describes WQA certification to NSF/ANSI/CAN 61 for material safety and 372 for lead-free compliance. It expressly excludes WQA certification for contaminant reduction, treatment performance and structural integrity. Do not read the logo as independent proof of a particular chlorine, lead or scale-reduction result. Ask for the exact listing and performance evidence behind any claim in your quote.
Choose using a written treatment target
Use these three examples as a decision aid, not a product endorsement:
- “I want a lower hardness reading.” Request a CK10 or Hybrid quote with inlet hardness, target outlet hardness and programmed capacity documented.
- “I want filtration and no salt refills.” Evaluate HALO 5 against the particular filtration result you need; accept that it will not produce a soft-water hardness reading.
- “I want both filtration and softening.” Compare Hybrid with separate HALO 5 and CK10 equipment. Ask about the space needed for the brine tank, access for service and the replacement plan for each treatment stage.
Supply your water test results and ask for a written itemized quote. If you already own equipment, our HALO not softening checks help separate a treatment mismatch from a softener problem. For ongoing care of a standalone filter, see HALO 5 maintenance.
Frequently asked questions
Is HALO 5 a water softener?
HALO 5 is a filtration and conditioning system. It does not remove the calcium and magnesium measured by a hardness test. CK10 and HALO Hybrid use ion exchange to soften water.
Does HALO Hybrid need salt?
Yes. HALO Hybrid uses ion-exchange softening with a separate brine tank. Its single treatment tank combines filtration and softening; it does not eliminate the salt tank.
Can HALO 5 and CK10 be used together?
Yes. HALO markets a Highly Filtered Softening Combo that pairs HALO 5 filtration and conditioning with a CK10 softener. That combination should not be confused with HALO 5 alone.
Is the HALO 5 million-gallon figure a softening capacity?
No. The current HALO 5 sheet bases its gallon capacities on chlorine reduction at 1 ppm incoming chlorine. Softener capacity is a different measurement, so ask for the exact CK10 or Hybrid capacity at the quoted salt setting.