ITidyHome 2 Pack Spa in-Filter Mineral Sticks Parts,for Hot Tub Filter Cartridge Spa Swimming Pool Fish Pond, Last for 4 Months, Yellow& Blue

two make it for a year in my hot tub by changing it out every 6 months

The product arrived in a timely manner and was true to it's description.

I don't normally write reviews.This product gummed up my filter and made my hot tub stick!