I've used these cartridges many times as recommended buy the supplier of my hot tub. I've purchased them from the supplier but these are a lot cheaper and come with free delivery.
Verified purchase: Yes | Condition: New
Excellent value great quality easy to fit great delivery
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
Very happy. They last for four months.
Verified purchase: Yes | Condition: New
Stuff we need for the hot tub great price
Verified purchase: Yes | Condition: New
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