FROG @Ease Replacement SmartChlor Cartridge for use with Hot Tub FROG @Ease Floating System - Hot Tub Sanitizer System Supports Less Chlorine Use - 3 Pack

The frog system is great. It takes the work out of hot tub chemistry. I have a 375 gallon hot tub and the chlorine cartridge last abut 2-2.5 weeks at a time. Water stays at about the same 2-3ppm the whole time. Great product if you’re new to hot tubs or a seasoned veteran.

I started using the FROG @Ease SmartChlor cartridges to simplify hot tub maintenance, and they've made a noticeable difference. The water stays clear and feels softer, and I don't have to constantly monitor chlorine levels. The cartridge flips over when it's time for a replacement, which is a helpful reminder.​While the cartridges aren't the cheapest option, the convenience and consistent water quality make them worthwhile. They typically last around 3-4 weeks, depending on usage. Overall, they've made hot tub care much more manageable

This is the best stuff ever change it once a month let it float in the spa really don't have much to do to it maybe because also it's a UV light but it works great

This is a good product, and Amazon is the easiest way to get it.

I’ve been using the Frog Cartridge system in my hot tub for a few months now, and it’s been a game-changer. Maintenance has never been easier or more hassle-free. The pre-filled mineral and bromine cartridges are simple to use and eliminate the guesswork of measuring chemicals.I’ve noticed a significant improvement in water quality—crystal clear and soft on the skin without that strong chemical smell. It’s also reassuring to know the minerals provide an additional layer of water care while reducing bromine levels, making it gentler on my skin and swimwear.The convenience of replacing the cartridges every 3-4 weeks (depending on usage) means I spend less time worrying about my hot tub and more time enjoying it. Plus, the built-in reminder system helps me keep track of when it’s time to swap them out.

These are the best system for a hot tub. Low maintenance and simple to use

Having been a Certified Pool Operator for public pools in a previous life, I'm pretty anal about chemical balance. We have a 450 gallon hot tub at home and the consistency, controllability, and predictability of the sanitizer PPM with the Frog is something I wish I could have had access to in a commercial setting. Very happy with how long it lasts (usually get a month and a half on a chlorine side) and how consistent and steady the chemical measurements are. We keep the temp around 98-100, filter runs twice a day. 2 adults. Southern California so it gets year- round use. Ozonator. Going on 9 months without having to change the water. That's pretty great.

Yea.. it last 2 or 2 1/2 weeks... I still shock when more than one person gets in. An daily teaspoon of bromine (spelling)... but the product keeps mine clear! Worth the money in my book.