Clorox Spa® Scale & Stain Control is a liquid product that protects your spa and equipment from metal stains and scale formation on spa surfaces, heaters, piping, and equipment—preventing stains caused by iron, copper, and manganese. Test your spa water frequently to maintain a pH balance of 7.2-7.6 and alkalinity of 80-125ppm for plaster spas and 125-150 for vinyl or fiberglass spa.

Product reviews

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Quick Acting PH Up

Spa PH up works effectively and quickly. Can expect immediate improvement in quality of the water and chemicals being balanced. Easy to open lid. Odorless and easy enough with the right amount and the proper amount to clean up water.
Ease of Use: 5 Effectiveness: 5
07/13/2023
chulk
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pH Up

The Clorox pH Up product has easy to understand and follow directions. This product dissolved quickly and completely. After using this product to balance my spa water, the work to maintain balanced levels decreased. My water remains clear and odor free when this product is used according to the directions.
Ease of Use: 5 Effectiveness: 5
07/13/2023
Alkalinity Increaser
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Clorox man

Too bad I didn’t get to use the product since my spa is connected w my pool and I all are chlorine based. In general I’m pretty happy with Clorox products. I wished the app was better and more accurate but hey.
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07/08/2023
PoolMan
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Great for Spa

Great product for my spa. Consistent and works well when I need to balance the water. Enjoy having a product that is quality and not jeopardize keeping the water balanced in my spa with a generic product that may not be consistent.
Ease of Use: 4 Effectiveness: 5
07/01/2023
Brian S
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Simple, easy to use product gets the job done.

Simple, easy to use and gets the job down as you balance your spa. When I refill my spa, adjusting the pH is one of the first steps to having comfortable water. I just test the spa, determine how much pH up needs to be added and throw it in while the jets are running.
Ease of Use: 5 Effectiveness: 5
06/30/2023
Ryan H
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Clorox Spa pH Up Review

The Clorox Spa pH Up product works great for my spa. I use it to raise the pH level. This product helps reduce skin irritation and also guards against corrosion. I would definitely recommend this product to any spa owner. Just follow the instructions on the back of the container to raise the pH level and have beautiful water in your spa.
Ease of Use: 5 Effectiveness: 5
06/23/2023
JohnG
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works great

Raised ph levels over night, just a little at time will raise it without risk of going to too high too fast. I used about a quarter cup each time as my spa is only about 300 gallons and didn’t want to have to lower it
Ease of Use: 5 Effectiveness: 5
06/07/2023
Gryphyn
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Excellent as Always!

I use the Algaecide weekly to avoid algae in the pool and spa. It is a simple way to keep the pool looking great year round! With this, I have no issues with algae developing in the pool no matter the season, I highly recommend!
Ease of Use: 5 Effectiveness: 5
05/30/2023
Paul1
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Quick and easy

Was easy and safe to use and by the instructions was good percentage of ingredients which makes it use less as well as being better to handle with good solid lid that let me measure quickly right amounts and store it well
Ease of Use: 5 Effectiveness: 5
05/30/2023
firelord
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Spa PH UP

Very easy to use. Very simple to read the ingredients, and to be able to apply the product. Works Great, I would highly recommend this because it does what it is suppose to do and was very easy to use.
Ease of Use: 5 Effectiveness: 5
05/30/2023
fllocksmith
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WOW Clorox just made my life easier spa products

I started using Clorox spa products at first because of price but now it’s because they really do work and it so easy I just use the spa products like it’s tells you to and it’s always clean and smells great thank you Clorox
Ease of Use: Effectiveness:
05/19/2023
The cleaner
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Clorox ph up up away

Definitely a Clorox fan from here on out. Our spa agrees
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01/19/2017
Jenn