FROG @ease® In-Line System

Built-in Water Care That Puts You At Ease

Average Rating: 4 67 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. Laura Lepak

    Rating: 2

    When I started this Frog system it was great, cartridges lasted 4-6 weeks. Now I am extremely disappointed that I am replacing them 2/3 weeks- what happened to your product?

  2. Elaine Moehring

    Rating: 3

    Need to provide refills for the cartridges; it will soon be a reason to find a better system. We live in a beautiful community surrounded by some of the grandest mountains in this country – and even if we didn’t’ we ALL need to reduce the amounts of plastic we use; reuse of the cartridges is just one way to do so. Have some of the same issues as others in determining change of cartridges but we deal with it.Thanks.

  3. Carrie Walter

    Rating: 5

    Love your products.

  4. Ronald Palmer

    This product is easy to use, does an ok job, but be aware you may not always be able to get it. The last time I needed it, it was on back order and took 3 weeks to find some

  5. Deb

    Rating: 5

    Great product and easy to maintain clear water. Smartclor cartridge lasts me 4 to 5 weeks on #3 and we use the hot tub daily. Still on same mineral cartridge since September. When a cartridge is empty I recycle it but would be nice if it was refillable. Shock every other week. Stain and scale on opposite week. So far so good with clear water. Filtration system runs a cycle of twice a day for 4 hours and kicks off and on periodically. Love my Marquis hot tub! Key also of clear water is filtration.

  6. Frank

    Rating: 1

    I am a new hot tub owner. I’m disappointed that I’m have to change out these cartridges every few weeks. They don’t last nearly as long as advertised. I’m spending a fortune, and making tons of trips to local suppliers as online prices are outrageous. Very unhappy.

  7. Eric Howard

    Rating: 1

    The inline system works great, but I see no reason to throw away this much plastic every two weeks. Give me a three months supply I can refill in a screw-top cartridge. It’s Ironic your a water care company that doesn’t care about plastic in our oceans.

  8. Rick Leneau

    Rating: 1

    Also very disappointed. I have to replace my cartridge every week.

  9. Ron Cirelli

    Rating: 3

    I am new to hot tubs I have had mine for two weeks a Marquis with frog cartridges we have used it every day and also it has micro silk which we have used every day for two weeks water was crystal clear then two weeks to the day the water became cloudy what could be wrong called dealer they said to shock it which I have twice in two days still cloudy went and got water tested at pool store said oh was high fixed that but it is still cloudy please help

  10. Ken Johnson

    Rating: 1

    I am becoming very disappointed in my inline system for my spa. I purchased in June and have had to change the cartridge 6 time I am getting 2 weeks at best. I am needing to shock weekly on top on using the chlorine cartridge. I have spent over $100 on other chemicals to keep in balance. I need suggestions or help as the pool guys are more interested in selling chemicals.

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