FROG @Ease in-Line Mineral Cartridge + 4 in-Line SmartChlor Cartridges for Hot Tubs up to 600 gallons for use in Marquis, Caldera, Artesian and Hot Springs Spas; Hot Tub Sanitizer, Cyanuric Acid Free

Works great on my hot tub.

So far these are working great in our new hot tub

Best value I could find for this product.

Makes hot tub maintenance so easy

Very pleased! Quick shipping.Good vaue

I switched from bromine to the smartchlor system and it definitely has less of a chemical smell to the water. To me, that’s a big deal because I like going in the hot tub but I don’t want to smell like it all day. The water stays clear and it’s effective. I only wish it wasn’t so expensive.

I have used my hot tub with and without the frog filters. Of course it is cheaper to do your own chemicals but frankly who wants to. This packet covers the four months that I use it

Keeps our hot tub clear. We have been using this product for years.