SpaGuard Spa Sentry (1 qt)

My hot tub pH has been all over the place. The water will really irritate skin when it is out of balance. I had been using pH up/down chemicals, white vinegar and baking soda but nothing was keeping it consistent. This product was a life-saver and probably the best single product I've ever purchased for the spa! It's a little pricey since you have to use the whole bottle in one go. But well worth it. It's been weeks since I used spa sentry and have had no pH fluctuations like before! (I test before and after each use) we use the hot tub several times a week. I'm really glad I bought this.One thing to note (and it says on the bottle) is that you need to clean the filter a few days after using this product. There is a lot of precipitate that collects on the filter, but rinses off easily.

Works great at maintaining ph in my hot tub

This product is great for helping to keep hot tub water clean. I use it in conjunction with a mineral stick (Nature 2 or similar) and the water stays stable and consistent for months….much longer than with chlorine and shock.

It's been 8 weeks now since I first used SpaGuard Sentry, and I've only had to adjust the pH once.

Used for my hot springs hot tub

good product

I made the mistakes of filling my spa with softened water. Found out that its no good for a spa. Ordered this and put a bit into the water and got the hardness level back up.

Impossible to use if you are also trying to increase hardness