FROG® @ease® In-Line System

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

Average Rating: 4 70 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.

inline family

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. JJ Miller

    Rating: 1

    The inline system is convenient, but there are 2 major problems:1) The grey cartridge only lasts a couple weeks, far shorter than advertised2) it’s impossible to refill it, so you have to throw away and rebuy 28 of these cartridges every year! It’s a huge waste of plastic!!Please create a refillable cartridge and then sell the special chlorine granules separately!

  2. Ryan

    Rating: 1

    The grey chlorine inline cartridge only lasts at most 2 weeks, not the 4 weeks that is expected, which doubles the expected cost! Other than that it seems to work well. Please fix the grey cartridge so it lasts a full 4 weeks!

  3. Scout

    Rating: 4

    I have no issues, but the chlorine cartridge lasts less than 3 weeks for a 460 gallon hot tub that is used 5-7 days a week. We also have to add chlorine after each use to make this cartridge last longer. I don’t really think it’s as “smart” as it claims to be.

  4. Kevin O’Donnell

    Rating: 5

    “EASE” Frog system makes water care for your hot tub a breeze

  5. Larry May

    Rating: 5

    We have had our Bull Frog Spa for almost a year. It uses the pre-filled cartridges that fit saddled on the filters. There are very few places where this system is available and we are very disappointed with this situation not to mention how expensive it is. When will this system be more widely available?

  6. joey b

    Rating: 2

    Not impressed. They advertise one cartridge lasts for 1 month. Def not true. Im lucky to get 3 weeks out of it (yes, my water is balanced). More frustrating though is the plastic wrap that comes on the cartridge. Its had to get off, even with scissors. if there is a Frog Human actually reading this, PLEASE, put some perforations on your packaging… Its absolutely maddening.

    • Tom Sager

      I am sorry to hear about your frustration with the @ease Floating System.

      The @ease SmartChlor cartridge lasts between 3-4 weeks depending on use and size of your spa, and the mineral cartridge lasts 4 months. If you’re SmartChlor cartridge is around that old you can test to see if it’s empty by removing the SmartChlor Cartridge from the system, drain all the water and shake to see if you hear any SmartChlor left inside.

      Thank you for your feedback regarding the packaging, this helps us improve our products to better suit our customer’s needs.

      I hope this helps, feel free to follow up with any questions you may have.

  7. Tyson

    Rating: 3

    Good product. Unfortunately I can only get about 1.5 weeks out of my gray cartridge .

  8. Peter C Home

    We really like this product – adding a mini-water softening mineral system seems to make all the water chemistry much easier to manage and allows for smaller doses that keep the water very clean. Making the cylinders refillable would greatly improve the product and reduce unnecessary plastic waste.

  9. Eric

    Rating: 4

    the system is easy to use, just wish they made a refillable cartridge and you could buy just the chorine.

  10. Bob Norris

    Rating: 5

    Love the product change grey side 3-4 weeks but sometimes last up to 6 weeks blue side every 3 months.. great product…

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