Spa Frog Serene Refill Cartridge Kit

Great product that is easy to use and takes a lot of the guess work out of keeping the spa water clean and sparkling.

It is very easy and convenient using the frog cartridge, but very expensive wish there was a price drop!! . I really like $1 days.

these were recommended from the people we bought the spa from and they work great and very easy to refill

We've been using Frogger for as long as we've had our tub, about 18 years, and it makes it really easy to control the levels.

This is about new product Alkalinity Up & Ph with the 5 pages of how and when to use it. It was much simpler to use these products separately.
As always love the Frog set of cartridges. Reliable over the years.