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Your cart is empty.SpaGuards Spa Sentry gives spa owners a one-step liquid additive to avoid pH bounce for up to 1 month per application, simply by adding directly to water. Before using this product you must first drain and refill your spa and set the desired level of both pH and alkalinity before applying. Spa Sentry also contains a clarifying agent that removes dissolved metals in your water, giving your spa clearer and softer water that will be instantly noticed by bathers.
Isabella
Reviewed in the United States on March 10, 2025
Always trust spa guard for all of my hot tub needs.
George H.
Reviewed in the United States on June 16, 2024
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.
Karen L
Reviewed in the United States on June 10, 2024
Works great at maintaining ph in my hot tub
David
Reviewed in the United States on March 27, 2024
It's been 8 weeks now since I first used SpaGuard Sentry, and I've only had to adjust the pH once.
Peggy A.
Reviewed in the United States on November 16, 2024
As described, good price, nice product & great price!
Koko Black
Reviewed in the United States on April 20, 2024
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.
eliells
Reviewed in the United States on May 6, 2023
Impossible to use if you are also trying to increase hardness
CabinLife
Reviewed in the United States on November 5, 2023
Half a bottle in our jacuzzi j-225 each time we fill up and the tub is almost perfect. Maybe one or two caps of shock along with the floating bromine dispenser and she is good to go.
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