FROG® @ease® In-Line System

The built-in Hot Tub Sanitizer with minerals and up to 75% Less Chlorine

Average Rating: 4 69 Reviews

Introducing a breakthrough in sanitizing that comes ready to use on your hot tub.  With the built in FROG @ease In-Line System, you simply open the cap on your hot tub, snap in the conveniently adjustable cartridges and enjoy weeks of cleaner, clearer and softer water. FROG @ease uses FROG Minerals and SmartChlor® Technology that creates Fresh Mineral Water® by killing bacteria two ways with up to 75% less chlorine and a lot less work!

Pool Foreground Hot Tub Foreground
@ease 75 Percent Less

Up to 75%* less chlorine with no frustrating yo-yo chlorine levels

Shock Once

Shock only once a month

Self Regulates

Self regulates for continuous crystal clear water

@ease Easy On

Easy on hot tub surfaces with less odors

@ease Color Match

Single color match for easy reading – exclusively with FROG @ease Test Strips

No Constant Monitoring

No constant monitoring

@ease No Mixing

No mixing chemicals

Money Back Guarantee

Money back guarantee


Another FROG @ease benefit – no cyanuric acid that can lead to problems.

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Video Introduction to FROG @ease Inline System


Additional Information

The @ease System combines the proven FROG mineral formula for killing bacteria with SmartChlor Technology that maintains a consistently low chlorine level for weeks.

Unlike normal chlorine that is used up when you get in, SmartChlor continues to maintain the same level which is up to 75% less than hot tubs using Dichlor (standard hot tub chlorine). That’s why we call it self-regulating.  It goes to work when the hot tub needs sanitizing so there are no frustrating yo-yo chlorine levels.  This time-released method is also why less shock is needed to maintain the hot tub. When the SmartChlor Cartridge is depleted the system will flip over as a visual reminder to replace the empty cartridge with a new one.

This technology is so unique it has its own testing method that’s easier than standard test strips.

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In 2 seconds, you can know precisely whether your pH, Total Alkalinity and Calcium Hardness are balanced, plus whether SmartChlor® needs replacing. Simply dip the FROG @ease Test Strip into the water, remove with the pads facing up and shake once to remove the water on the FROG Test Strips. Then put it up to the color chart on the bottle and compare.

If the SmartChlor color on the strip is darker than the bottle label, the water is fine. If it is lighter it’s time to replace the Smartchlor Cartridge.

This technology is so unique it has its own testing method that’s easier than standard test strips.

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A new standard for keeping your Hot Tub water crystal clear- continuously.

Less Chlorine*

Up to 75% less chlorine with no frustrating yo-yo chlorine levels.

Less Shocking

Only shock once a month!

Self Regulates

Self Regulates for continuous crystal clear water.

Less Odors

Easy on hot tub surfaces with less odors.

  • Unique form of chlorine that works only with FROG® minerals
  • It’s EPA registered
  • Unlike dichlor it’s slow dissolving
  • It’s self-regulating by automatically delivering more free chlorine when needed
  • It maintains a consistent 0.5 – 1.0 ppm free chlorine level at all times

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What size hot tub will FROG @ease work in?

Hot tubs 150 to 600 are perfect for FROG @ease.

How does FROG @ease compare to bromine floaters or using chlorine?

With standard chemicals you experience peaks and valleys in your sanitizing routine.  When you add chemical, the level spikes, when you use the tub, the level drops. This yo-yo method goes away with FROG @ease because it maintains the same level of sanitizing all the time.  Plus it’s conveniently tucked away with easy access whenever you need to change a cartridge.

How can it work so well with 75% less chlorine?

SmartChlor is not a typical chlorine.  It will consistently maintain a 0.5 to 1.0 ppm free chlorine level. This would not be enough on its own; but with FROG minerals, it’s a perfect combination that kills bacteria 2 ways so you have a cleaner, clearer hot tub that’s wonderfully soft and odor free!

How long do the Mineral and SmartChlor cartridges last?

The mineral cartridge lasts four months or whenever the hot tub is drained and refilled. The SmartChlor Cartridge lasts 3-4 weeks depending on the size of your tub and how often it is used.

Is a FROG @ease System expensive?

SmartChlor is slightly more expensive than dichlor but less than other systems. Consumers who have tried it tell us it is SO worth the money because it makes owning a hot tub extremely easy with far less monitoring and no shocking for an entire month. You save time and the cost of shock treatments plus with up to 75% less chlorine, your suits won’t fade and your hot tub itself has less wear and tear.

Which hot tubs have the FROG @ease In-Line System built-in?

Marquis Spas, Caldera Spas, Artesian Spas and Hot Springs Spas all have the in-line system installed on select hot tub models at their factory.

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* Compared to the minimum ANSI recommended bromine or chlorine level of 2.0 ppm for a hot tub

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See Our Customer Reviews

  1. Sandy Mason Abernethy

    Rating: 3

    I echo Steve Wilent. Please make either refillable or at least recyclable cartridges. It’s a crime to throw all that plastic into the landfill. Thanks.

  2. deanna

    Rating: 5

    very convenient .can I use just the gray chlorine one and not the minerals?I have mineral sticks from previous spa.thank you

  3. Ray Cilimburg

    can I order directly through “you”?

    • Tom Sager

      Hi Ray,

      We have an extensive network of FROG dealers where you can purchase our products and receive outstanding service. You can find your local dealer through this link.

      Let me know if I can help you with anything else.


  4. Doug monroe

    Rating: 4

    Love products just need to no if they have something other than test strips to check water maybe digital

  5. kmott

    Rating: 5

    I was about ready to put my tub on eBay when I heard about the chlorine cartidges (severe itching with the bromine cartridges that came with my tub. I now have crystal clear water and NO ITCHING!

  6. Dave Emery

    Rating: 5

    This is my fourth hot tub and first using the Frog Ease In Line system on my Marquis Spa. What a difference! Water is so much less chlorinated yet sparkly clean. I use my tub daily and it is so nice to set and forget!

  7. Bill Payne

    The in-line system is so easy to use. Makes keeping my spa water safe and clean effortless !!!!

  8. Michael Henry

    Rating: 5

    So not gonna lie. At first I was adding more chemicals to valence my chemicals via water test at a local pool store. Played that game for 3-4 months and became very frustrated. After talking to my local Family Leasure where I purchased my spa we figured out I was the problem. Now my water is great with a lot less work! Love the Frog system, I did a lot of research before purchasing and ultimately made the final decision because of the in-line system. I am very happy with my decision

  9. Alan Huss

    Rating: 5

    I Have Enjoyed the Convenience of the In-Line System. Much than Floating tabs in the water!

  10. Steve Wilent

    Rating: 1

    Like some of the other reviewers here, I like the convenience of the in-line system, but dislike having to dispose of a SmartClor cartridge one a month or so. Please give us refillable cartridges!

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