3 Gray Mineral Ion Cartridge Sticks

Just as good as the name brand for a lot less. Fits and works perfect in our Hotsprings hottub.

These were much less expensive than what I was paying at the hot tub store. According to the water tests, they’re also just as effective.

I've been using this kind of device since I bought my hot tub 15 years ago. I'm hopeful they do something, but have no way to validate the claims they make. I figure it's a small cost for a potential benefit.

Always the best value with spas that require the Mineral Ion Cartridge Sticks. So easy to use.

Do not use this for Watkins Hot Springs Hot tubs. The packaging all looks like it's correct, and the size when compared to my old ones, but when you attach the top cover on the unit and drop it into the sand pipe, it falls down into it. It doesn't sit on stop of the pipe like others I've purchased. I spent more than 30 minutes trying to get it out of the pipe. I finally did using a suction cup but took multiple attempts. You have to attach the extension rod to keep it above the top of the sand pipe, and then the cap that came with the box won't stay attached. I used my old cap but it sits up higher so now the cap that holds the filter in place won't secure all the way. The best I can determine is the cap that attaches to the filter unit isn't as wide on the undersides as the original design allowing it to slide into the pipe. It also only comes with two caps, not 3.

I have used these sticks for years. No problems!

Good price

I don't recommend for Hot Springs Spas. Two out of the three fit. For some reason the third one doesn't have a ring at the end so when i went to install it, it was too narrow and it fell all the way into the pipe and I needed a shop vac to retrieve it. The other 2 worked fine and kept my water very clean.