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Crystal Quest 210,000 Grain Commercial Softener

Ranked #2 of 30 in Best Water Softeners (2026). Here is every spec we scored, where it came from, and how it compares.

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CQ

#2

Crystal Quest 210,000 Grain Commercial Softener

Best for: 210,000-grain single-tank softener listed at 60 GPM, 7 cu. ft.

6.4/10

What we like

Top grain capacity in this comparison (210000 gr)
Top flow rate in this comparison (60 GPM)

Watch out for

Warranty not published by Crystal Quest

Score breakdown

Grain capacity 36%

Flow rate 28%

Warranty * 20%

NSF/ANSI 44 named 16%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Grain capacity	210000 gr
Flow rate	60 GPM
Warranty	Not listed
NSF/ANSI 44 named	No
Grain capacity (maker)	210,000 grains (official product name)
Flow rate (maker)	60 GPM (official product listing)
NSF/ANSI 44 (maker)	Not listed
Warranty (maker)	Not listed
Resin volume (maker)	Single 7 cu. ft.
Price	Check price

Check price at Amazon

Specs source:

Crystal Quest: 210,000 Grains

Crystal Quest 210,000 Grain Commercial Softener head-to-head

Head-to-headCrystal Quest 120,000 Grain Commercial Softener vs Crystal Quest 210,000 Grain Commercial Softener Head-to-headCrystal Quest 210,000 Grain Commercial Softener vs Aquasure Signature Elite 72,000 Grains with UV Featured inBest High-Capacity Water Softeners (2026)

How it compares

Open the full comparison table

Crystal Quest 120,000 Grain Commercial Softener

#1 · 120,000-grain single-tank softener listed at 60 GPM, 4 cu. ft.

Aquasure Signature Elite 72,000 Grains with UV

#3 · 72,000-grain Signature Elite softener with fine-mesh resin and 18 GPM UV

Aquasure Signature 64,000 Grains with 12 GPM UV

#4 · 64,000-grain Signature softener bundled with a 12 GPM UV system and a pre-filter

Crystal Quest 90,000 Grain Commercial Softener

#5 · 90,000-grain single-tank softener listed at 19 GPM, 3 cu. ft.

APEC Hydro Express 30

#6 · 30,000-grain softener with a 17.6 GPM peak flow and a 5-year limited warranty

Aquasure Signature 48,000 Grains with 12 GPM UV

#7 · 48,000-grain Signature softener bundled with a 12 GPM UV system and a pre-filter

Aquasure Signature 32,000 Grains with 8 GPM UV

#8 · 32,000-grain Signature softener bundled with an 8 GPM UV system and a pre-filter

Aquasure Harmony 72,000 Grains

#9 · 72,000-grain Harmony Series whole-house softener

Aquasure Harmony 72,000 Grains Fine Mesh

#10 · 72,000-grain Harmony softener with fine-mesh resin

Aquasure Harmony 72,000 Grains with Pre-Filter

#11 · 72,000-grain Harmony softener with a 10-inch triple-purpose pre-filter

Aquasure Harmony 64,000 Grains

#12 · 64,000-grain Harmony Series whole-house softener

Aquasure Harmony 64,000 Grains Fine Mesh

#13 · 64,000-grain Harmony softener with fine-mesh resin

Aquasure Harmony 64,000 Grains with Pre-Filter

#14 · 64,000-grain Harmony softener with a 10-inch triple-purpose pre-filter

Aquasure Signature Elite 64,000 Grains with UV

#15 · 64,000-grain Signature Elite softener with fine-mesh resin, KDF85 carbon and 18 GPM UV

SoftPro Elite Smart HE (City Water)

#16 · 64,000-grain Elite Smart HE softener for city water

APEC Hydro Express 45

#17 · 45,000-grain softener with a 17.6 GPM peak flow

Crystal Quest 60,000 Grain Commercial Softener

#18 · 60,000-grain single-tank softener listed at 12 GPM, 2.0 cu. ft.

Aquasure Harmony 50,000 Grains with Pre-Filter

#19 · 50,000-grain Harmony softener with a triple-purpose pre-filter

Aquasure Harmony 48,000 Grains

#20 · 48,000-grain Harmony Series whole-house softener

Aquasure Harmony 48,000 Grains Fine Mesh

#21 · 48,000-grain Harmony softener with fine-mesh resin

Aquasure Signature Elite 48,000 Grains with UV

#22 · 48,000-grain Signature Elite softener with fine-mesh resin, KDF85 carbon and 12 GPM UV

Crystal Quest 45,000 Grain Commercial Softener

#23 · 45,000-grain single-tank softener listed at 12 GPM, 1.5 cu. ft.

iSpring WCS45KG

#24 · 45,000-grain whole-house softener with a backwash feature

iSpring WCSTB45KG

#25 · 45,000-grain whole-house softener with automatic backwash

Aquasure Harmony Lite 34,000 Grains

#26 · 34,000-grain all-in-one cabinet Harmony Lite softener

Aquasure Harmony 32,000 Grains

#27 · 32,000-grain Harmony Series whole-house softener

Aquasure Harmony 32,000 Grains Fine Mesh

#28 · 32,000-grain Harmony softener with fine-mesh resin

Aquasure Harmony 32,000 Grains with Pre-Filter

#29 · 32,000-grain Harmony softener with a 10-inch triple-purpose pre-filter

Aquasure Harmony Lite 32,000 Grains

#30 · 32,000-grain all-in-one cabinet Harmony Lite softener