Jandy Zodiac W28000 Duoclear & Fusion 25 Replacement Mineral

The Verdict

Bottom Line Up Front: If you own a Jandy Zodiac Duoclear or Fusion 25 mineral pool system, this W28000 cartridge is the only replacement you should consider. It’s the genuine OEM part, it drops right in with zero fuss, and it genuinely cuts your chlorine consumption by more than half. The 4.7-star rating across 235 reviews isn’t inflated — this is one of those boring, essential pool parts that just works.

What You Actually Get

The box contains the replacement mineral cartridge itself — a sealed cylinder packed with the copper and silver mineral blend that does the heavy lifting — plus the internal screen assembly. That second piece matters more than most buyers realize. The screen catches debris before it reaches your pump, and Jandy recommends replacing it alongside the minerals. If you’ve been running your old cartridge past its 6-month mark, that screen is probably clogged with scale and grit. This kit solves both problems at once.

Performance and Real-World Use

The mineral technology here is straightforward: copper kills algae and silver kills bacteria, which means your chlorine doesn’t have to do all the work. In practice, pool owners report dropping their chlorine usage by 50 to 70 percent. One reviewer put it plainly: “Cut my chlorine bill in half and my water stays crystal clear all summer.” Another noted, “I was skeptical, but after the first month my pool guy commented on how little chlorine I was using.”

Installation takes about five minutes. The cartridge twists into the housing, and the screen slides into place — no tools, no plumbing changes. If you can unscrew a jar lid, you can install this. The system works with salt pools too, which is a common question. If you’re running a salt chlorine generator alongside the mineral system, this cartridge still functions normally.

Where It Falls Short

The honest downsides here are cost and rigidity. At the price per cartridge, you’re paying a premium for the Jandy name — generic alternatives exist for less, though many buyers report fit issues and shorter lifespans with off-brands. The 6-month replacement schedule is fixed, not usage-based. If you have a light-use pool or a short season, you’ll still be swapping this out twice a year. One reviewer summed it up: “Wish it lasted longer, but it does what it says.”

Who Should Buy This

Buy it if: You own a Jandy Zodiac Duoclear or Fusion 25 system and want the manufacturer-specified part that won’t void your warranty. You’re tired of the chlorine cost and smell, and you want a proven mineral solution.

Skip it if: You have a different brand of mineral pool system — this only fits the two Jandy models listed. Or if you’re on a tight budget and willing to gamble on generics, though I’d caution against it for a part this critical to water chemistry.

FAQ

Q: How often do I need to replace this cartridge? A: Every 6 months, per Jandy’s spec. The minerals deplete on a timeline, not based on bather load. Set a calendar reminder.

Q: Will this work in my saltwater pool? A: Yes. The mineral cartridge operates independently of your salt chlorine generator. Many buyers run both systems together.

Q: Does it eliminate the need for chlorine entirely? A: No. It reduces chlorine demand by 50-70%, but you still need a sanitizer residual. Think of it as a chlorine multiplier, not a replacement.

The Verdict

Rating: 4.6/5 — This is the right part for the job. It’s not cheap, and the 6-month replacement cycle requires discipline, but it delivers exactly what it promises: less chlorine, clearer water, and a system that just works. For anyone already invested in the Jandy mineral ecosystem, this is a no-brainer reorder. The only reason I’m not giving it a perfect score is the rigid replacement schedule and the premium price tag.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.