Frog @Ease SmartChlor Floating Chlorine and Mineral Sanitizing System (2 Pack)

The floating Frog capsule regularly puts chlorine out into the hot tub, vs you having to continually add it. It works as expected, which is fine. I like using it, don't know if it is more or less expensive the then other way of doing it.

This system is pricey but convenient. If you want to spend the minimum time messing with your spa chemistry and the maximum time enjoying being in it then this might be for you. However it barely lasts as long as they claim so be ready to dish out some $$ on a regular basis.