Good addition to the system This unit slides right inside the filter cartridge. In combination with a new ozonator the water in the tub is very clear.

Don W. Pearson

on Amazon

7 years ago

Five Stars great price per item

k force

on Amazon

7 years ago

Five Stars Love this stuff...keeps spa sparkling cleae

M Berry

on Amazon

7 years ago

Best option for us We bought this for a used hot tub. We love that it doesn't have the chemical smell, your skin feels normal when you get out and it you only need a little non chlorine weekly. If you have a hot tub we would recommend this. I have sensitive skin and this doesn't irritate me at all.

Alice Cokefair

on Amazon

7 years ago

Less expensive version of Hot Spring product Fabulous for our Hot Spring spa! It's a great fit, works just as well as the Hot Spring version, except a 3 pack of these are nearly $9 cheaper.

Cicero Brian

on Amazon

7 years ago

Good Product Thanks.

Amazon Customer

on Amazon

7 years ago

Four Stars too ealry to tell, but based on other comments, cleaner water is safer.