Meet your new pool

pH Decrease 1kg

pH Decrease 1kg

Lower your Spa Pools pH levels with pH Decrease. Available on next-day nationwide delivery*.

In stock now

$20

Everything you need to know

Keep your water clear, and lower your pH levels with pH Decrease.

Crystal Water pH Decrease is a fast dissolving pH decreaser designed to work in any spa or swim spa.

Easy to use, with clear instructions on the back of the container.

For best results, test your water weekly, and only add if the test strip reads that your spa has high pH levels.
Ensure that you check and maintain your pH and Alkalinity levels weekly, and adjust as needed.

Click add to Cart, and this will go on next-day nationwide delivery*.

*Overnight Courier, next business day delivery. rural may take an extra 2-3 business days.
*Pricing does not include delivery, delivery fees can be found once you have added to cart.

Our promise to you

The Jet Process was developed following conversations with hundreds of kiwis about the best and trickiest parts of spa ownership.
Based on this, we have developed the below system.

01.

The Best Prices

As NZ’s only true online-exclusive spa pool retailer, with no costly show rooms, Jet Spas can offer superior products and competitive pricing.

02.

Simple Maintenance

Empty your Jet Spa once a year instead of every few months with our Simple Silver Water Treatment. Enjoy a safe and hygenic spa every time.

03.

Exceptional Standard 

Every spa pool is built with premium materials including North American acrylic, CD OZone water filtration, strong insulation, and superior jets.

04.

Amazing Warranty

Jet Spas offer an incredible 10 year structural warranty, and we back our heater and controllers with our 5-year Jet Warranty.

Like what you're seeing?

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Premium Spa Pool Features

Kiwis love Jet Spas. Here are a few reasons why our pools are so popular.

Clearer Cleaner Water

Chlorine-free, bromine-free; hassle-free options available

Hello Smartphone

Connect your smartphone to our WiFi compatible controller

Scratch Resistant Acrylic

Our premium North American acrylic looks just as good as the photos

Truly Relaxing Massage

Using world-leading jets, a Jet Spa massage is simply superior

The Jet Warranty

Buying a spa pool is a big investment, and we want to help protect your investment. When you buy a Jet Spa, you can rest assured knowing you have some of the strongest warranties on the market.

10 Year Structural

5 Year Acrylic

5 Year Jets

5 Year Heater and Controller

More to love

All our spas include

Water filtration system

Our powerful OZone systems kills bacteria and oxidizes your water, removing the need for chlorine when used with Simple Silver.

Cover & Steps

Paying extra for a cover and steps? No way. As a standard, Jet Spas offer a cover and steps so that your spa is ready to use from the get-go.

Premium Insulation

Insulation is what makes the difference in your power bill. Our premium insulation helps keep your running costs low and your spa toasty.

Easy as!

Your Payment Options

Credit/Debit Card

Paying via visa or credit card is a safe way to ensure that the payment is quickly processed, and your order is secured.

Interest-Free Gem & Q Card

Enjoy your spa pool now and pay later with Gem and Q Card. Terms vary per product so contact our team to see finance terms available.

Bank transfer

For direct debits, we collect a 50% deposit and the remainder of the purchase due the month your new spa pool is due to arrive.

spa pool payment options

Reviews

Customer Feedback

5/5

We purchased the Thunderbolt 6 person Spa from Jet Spas, it is so roomy and we love the different massage options the jets and two pumps offer. The communication from Jet Spas, including post-sale support has been fantastic. This really is a spa company that offers best value for money without compromising on the important features.  Thanks Jet Spas.

Jessica, Whanganui

5/5

I got the gulfstream a few days ago and I am extremely happy with the spa. I did a bit of research before and I couldn’t find a more cost-effective option. Totally affordable and 12 months free-interest finance. Big Thanks Jet Spas Team :-)

Santiago, Hamilton

5/5

Our Jet Spa has been great thank you. It’s the perfect size as there’s only the two of us. Water usage and heating cost was a primary factor in choosing our latest spa. We use it most evenings and hope to continue usage through the winter as we have set it up under a louvre pergola six steps from the master bedroom slider. 

Heather, Tauranga

5/5

We had been searching for a small spa pool for a while and found Jet Spas website. We found that a Tango would be suitable for the two of us and that the pricing was very reasonable. Upon ordering Jet Spas were helpful and knowledgeable in assisting us with our purchase. We are very happy customers and have recommended Jetspas to close friends.

Amanda, Masterton

5/5

After much searching, we finally decided on a Jet Spa Gulfstream. From initial contact to after-sales service, we have been very happy with the communication from the Jet Spas team. The Spa is great, very well built, and the ideal size for two of us.

Chris, Whitianga

5/5
We got the Orbiter max spa and are so happy with it. We use it most days and the kids are obsessed with it. We have a VERY difficult-to-access section so had a bit of trouble with the delivery, but Jetspas went out of their way to find a solution and get us the spa in place. Very happy with the spa and service.
 

Sarah, Hamilton

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