Hot Tub Mineral Sanitizer for Hot Tubs Filter, Spas Filter, Cleans and Clarifies Last for 4 Months Treats，1 Pack

Works without leaving a chemical feel and smell on your body. We do keep our spa in tip top shape and change the water as needed, possibly more often than most. In our experience we love the natural feel of the water.

Great Product I dropped in Hot Tub and next day clear and clean Thanks

Priced better

Todo muy profesional

Perfect replacement for my hot tub. These minerals along with my regular shock treatments help keep the levels nicely balanced for me. Definitely works as described.

They fit perfect in the manufacturers slot on the skim filter door.

Exactly as described

What I like best about this product is that it's a pack I can simply throw into the skimmer above the filter and not a stick-style device that goes inside the filter with a leg that goes down into the piping. A stick I was using clogged up the works and made my spa system make a terrible gurgling noise.The Cendasun packet-style sanitizer doesn't block water flow at all. It just sits in the skimmer and does its job. This two-pack costs about the same as some brands' single sanitizer, and lasts the same 4 months. So if it works, it's a much better value.Also important: It has "sanitizer" in its name and the product description claims it contains silver. Read on for what I have to say about this.- - - - - - - - - - - -Yes, I buy mineral sanitizers, but . . .I have no idea whether mineral sanitizers really keep spa water clean with half the chlorine (which you still need) or whether this is just more stuff for hot tub owners to spend their money on.Since spa manufacturers recommend mineral sanitizers even if you buy them from someone else, then maybe there's something to them. What I do know is the spa makers and independent providers of spa maintenance info say that mineral sanitizers use silver or copper to achieve their water-cleaning results. Some sanitizers use zinc, but I can't find much third-party info on whether zinc is an effective sanitizer, so I stay away from them.A lot of the mineral cartridges or packs you can buy here don't list their active minerals and specifically don't claim to contain silver or copper. Some mineral-containing devices don't even have the word "sanitizer" in their product name or description. I posted a question to one maker/seller to ask about their product's sanitizing content, and they answered it's a stick, not a sanitizer! There you have it.This is all a long way of saying that if you want to use a mineral sanitizer in your spa, then read the product listing to be sure the seller even calls it a sanitizer and do your best to determine whether it contains silver or copper -- as this Cendasun mineral pack does.If the seller won't call the product a sanitizer, then why would you expect it to sanitize your spa?And remember: Mineral sanitizers do not do the whole job. They do not replace bromine or chlorine. They work with bromine or chlorine (your choice) but supposedly reduce the amount you need so your spa water feels and smells less chemically. So: If your instructions say to maintain 3ppm of chlorine in your spa water, use of a mineral sanitizer is supposed to let you get by with 1.5ppm. You also need to use your spa shock as usual.