FROG® @ease® In-Line System

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

Average Rating: 4 83 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 Hardness are balanced, plus whether or not 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 hold it up next to the color chart on the back of the bottle to compare colors.

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. Jack H

    Rating: 5

    My in-line Frog ease system did not function well, until I quit depending on information from the dealer not took over complete control. I read the hot tub manual carefully and instead of changing water every three weeks, after 4 months the water is crystal clear and I rarely have to add chemicals. I love the system. I do all the work so It’s too bad I can’t buy in bulk and save $’s on my maintenance. Product lasts mineral 4 months and SmartChlor 3 1/2 to 4 weeks

  2. Kyle

    Rating: 2

    It can’t keep up. We use our spa every day. Twice now our tub has read 0ppm of chlorine over the course of a two week period. The smart Chloe just can’t keep up with us. The water is perfectly balanced and checked daily. It just runs out of chlorine even when the cartridge still has granules in it! It may work for occasional users, but not with daily or twice daily users.

    • Bryan Wall

      Thanks for your review Kyle, we’re glad to hear from you. We’re also glad you’re enjoying your spa. We’d like to talk with you – the truth is, there are so many variables. If we find out more from you, we can help you and we’d really like to do that. Would you please call or email Dan Mosier? He’s helped lots of people with water care, he’s head of customer service with over a decade of experience. We’re pretty sure he can give you some helpful tips. You can reach him at 800-222-1069 or

  3. Gary Boehlke

    Rating: 1

    Something changed in the chlorine cartridges. During summer I got 3-4 weeks. Now I’m lucky for a cartridge to last a single week. I’ve bought off Amazon. Is it possible I’m getting knock off product?

    • Bryan Wall

      Hi Gary, we appreciate your review. Thanks for describing what’s going on. Your experience is unusual. So unusual, we’d like to talk with you to find out what’s going on. If you’ll please call or email Dan Mosier at 800-222-1069 or he’ll ask you for some information and answer your questions. Your experience is important to us, and we’d really like to help – call or email Dan and we can do so. Thanks again.

  4. K Johnson

    Rating: 5

    I absolutely prefer the FROG @ease Inline System. For me, it has taken the guesswork out of maintaining my hot tub. Before FROG, I had to constantly purchase multiple other products. This system is much easier to use, replaces almost everything I was using before, and has helped me to enjoy my hot tub again. I’ve actually started using my hot tub more frequently now. My advice to those who report their FROG cartridges don’t last: try lowering the dial setting. Depending on the size of your hot tub, start at a low number (like 1) and give it a day. Adjust each day by +1 until you find a number that works best for your tub. Or try reaching out to the dealer you purchased your tub from. They should be able to provide you with some helpful tips.

  5. doug rokisky

    All of the above is true, if they offered a bulk buy it might make sense. I use this product in a Artesean Elite hot tub, the dispenser is built into the tub.

  6. Tom Sager

    Hi Kristen,

    There could be a couple of things causing the cartridges to not last the typical 3-4 weeks. One thing that can cause a low reading is if a chlorine shock wasn’t used on the freshly filled spa. Using a chlorine shock on a freshly filled tub establishes a free chlorine reading between .5-1 ppm for the @ease system. Without shocking with a chlorine shock right away, the SmartChlor has no reserve to pull from when it needs to.

    The chart on the @ease manual for dial settings is just a suggestion. How often your spa is used and how many people are using it, can all be factors in what setting the SmartChlor should be set to. The dial can always be adjusted to fit your spa’s needs, but the free chlorine always needs to between .5-1 to properly sanitize your water

    One thing to look for is if the @ease system is flowing toward any jets or filters. If it does this it can drain the SmartChlor from the @ease, thus lessening how long the SmartChlor cartridge lasts and lowering the chlorine level.

    Hope this helps!

  7. Keith Minter

    Rating: 3

    Convenient product, but only getting 3 weeks at best out of each cartridge! Would be nice to purchase direct in bulk because as currently marketed, way to expensive! Will treat the spa the old fashion way until adjustments are made!!

  8. Jon B

    Rating: 1

    Was told by the dealer (and on this website) that the chlor cartridge will last 4 weeks. This is not true at all…would be lucky to get 2 weeks out of it. This is false advertising.

    • Tom Sager

      Hi Jon,

      Sorry to hear about your longevity issues. It most likely is due to a water balancing issue. Take a look at our free water balancing guide here.

      • If you are constantly adjusting the dial setting on the Smartchlor cartridge up and down it will run through the chlorine faster, instead let the self-regulating system and spa do its job.
      • Running the filtration cycle too often can also have an effect on this, make sure you have the settings on what your Bullfrog Spa manual recommends.

      Hope this helps! There are lots of variables and different possible situations to run through. If you are still having issues please give our customer service team a call at 800-222-0169.

  9. Kara Brochu

    Rating: 3

    I agree with other users. Way too expensive, not able to refill, and a waste of plastic, but 1 plus is convenience. Please reconsider how this product is made. Thanks

  10. Laura Dollinger

    Rating: 3

    It’s a good system, but we still have to shock the tub after every 3-4 uses, so weekly. The cartridges are expensive and not refillable. Makes for a lot of plastic waste.

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