---
product_id: 49627018
title: "pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance"
brand: "clearwater"
price: "$81"
currency: NZD
in_stock: true
reviews_count: 8
category: "Clearwater"
url: https://www.desertcart.nz/products/49627018-ph-plus-increaser-1-kg-granules-for-hot-tub-spa
store_origin: NZ
region: New Zealand
---

# Fast dissolving granules Precise pH control BISHTA approved safety pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance

**Brand:** clearwater
**Price:** $81
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your soak with perfectly balanced water—because your downtime deserves the best!

## Quick Answers

- **What is this?** pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance by clearwater
- **How much does it cost?** $81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/49627018-ph-plus-increaser-1-kg-granules-for-hot-tub-spa)

## Best For

- clearwater enthusiasts

## Why This Product

- Trusted clearwater brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Value:** 1 kg tub lasts multiple treatments, delivering consistent freshness without hassle.
- • **Effortless Spa & Pool Care:** Simple dissolve-and-add formula with clear instructions—perfect for busy managers.
- • **Trusted by Industry Leaders:** BISHTA approved and recommended by top spa brands like Bestway and Lay-Z-Spa.
- • **Maximize Chlorine Efficiency:** Optimizes pH to boost chlorine’s bacteria-fighting power for pristine water.
- • **Balance Your Water Like a Pro:** Maintains ideal pH 7.2–7.6 for skin-friendly, comfortable soaking.

## Overview

Clearwater pH Plus Increaser is a 1 kg granule formula designed to quickly and effectively raise the pH level of hot tubs, spas, and above-ground pools. By maintaining the optimal pH range of 7.2 to 7.6, it ensures water is comfortable for skin, enhances chlorine performance for superior hygiene, and keeps your water crystal clear. Approved by BISHTA and trusted by leading spa brands, this easy-to-use product dissolves rapidly and offers long-lasting value for routine water maintenance.

## Description

Great prices on your favourite Gardening brands, and free delivery on eligible orders.

Review: Super nice for hot tubs. - These granules are easy to measure and dissolve, and they reliably bring the pH back into the ideal 7.2–7.6 range after testing the water. The instructions are straightforward to follow and results show within a few hours, making routine water balancing simple even for beginners.​ For the 1 kg size the tub lasts a long time, so it offers good value while keeping hot tub and pool water clear and pleasant to use. Overall, it does exactly what is needed with no fuss, so it fully deserves a 5‑star rating
Review: Great product - This works really well in our hot tub, and keeps it fresh and clean. Comes in a secure tub that is waterproof and easily storable

## Features

- Causes serious eye irritation.
- Increases the pH level of your spa or above ground pool to maintain comfortable pH levels for your skin whilst you’re enjoying your hot tub or pool
- Ensures that your spa or pool stays hygienic and looking pristine so you can fully enjoy your experience
- Maintains the optimum pH level to enable chlorine treatment to work more effectively and clear any harmful bacteria
- Instructions are clearly stated on the bottle and it’s very simple to use- simply dissolve the recommended amount of pH chemicals in warm water and add the solution to the pool, increasing its pH level- check after minimum 4 hours
- Clearwater is a BISHTA approved member and recommended by brands such as Bestway and Lay-Z-Spa for reliable, safe and high-quality water treatment

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003O2F15A |
| Benefits | pH increaser |
| Best Sellers Rank | 175 in Garden ( See Top 100 in Garden ) 1 in Pool Balancers |
| Brand | Clearwater |
| Brand Name | Clearwater |
| Country Of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 9,708 Reviews |
| EU Spare Part Availability Duration | 1 Years |
| Global Trade Identification Number | 05031470039035 |
| Included Components | CLEAR WATER 1KG PH INCREASER |
| Item Form | Powder |
| Item Type Name | PH Plus Increaser |
| Item Weight | 1 Kilograms |
| Item form | Powder |
| Item weight | 1 Kilograms |
| Manufacturer | ClearWater |
| Number of items | 1 |
| Product benefits | pH increaser |
| Unit Count | 1000.0 gram |

## Product Details

- **Brand:** Clearwater
- **Global Trade Identification Number:** 05031470039035
- **Item form:** Powder
- **Item weight:** 1 Kilograms
- **Product benefits:** pH increaser

## Images

![pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance - Image 1](https://m.media-amazon.com/images/I/81yTqmuc2WL.jpg)

## Available Options

This product comes in different **Number Of Items, Style** options.

## Questions & Answers

**Q: What are the ingredients in Clear Water ph minus?**
A: Sodium hydrogen sulphate

**Q: I have a 9ft pool.and brought this item and i have no idea what i am doing. Can someone please advise me? I have no test strips is this essential?**
A: Hi there, you do need test strips because that way you can keep a check of your chemicals.
You also need chlorine tablets to keep your water germ free.  The Ph balance is if the Ph balance is low you can raise it, and if the alkaline balance is to low use bicarbonate of soda and that will bring it up. 
I generally have 2 chlorine tablets in all the time except when we are in the pool, and mix 1/2 pint of water with 4 dessert spoons of Ph balance as needed, the same with the bicarb. 
But that is why you really need the test strips because all the levels you need are on the side of the container in colour and you match a strip to the colours. 
Once you get the strips it’s quite easy. 
I hope this helps you. Enjoy your pool. Lindy

**Q: Hot tub advice. From tap zero on everything, stabilising alkalinity eventubut but ph sta low. New fill after giving up on last. What am i doing wrong?**
A: Concentrate on shocking the tub when filling from scratch which means add 3tbsp of chlorine and leave 24hrs then take dip sample but I rarely use anything apart from the chlorine nowadays and never had any problems

**Q: Hasanyone tried this in a Koi Pond?**
A: Hi, as far as I am aware no customer has used this item for a pond only have feedback for using the chemical in swimming pool and hot tubs. I am sorry I can not be much more help.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Super nice for hot tubs.
*by D***I on 9 December 2025*

These granules are easy to measure and dissolve, and they reliably bring the pH back into the ideal 7.2–7.6 range after testing the water. The instructions are straightforward to follow and results show within a few hours, making routine water balancing simple even for beginners.​ For the 1 kg size the tub lasts a long time, so it offers good value while keeping hot tub and pool water clear and pleasant to use. Overall, it does exactly what is needed with no fuss, so it fully deserves a 5‑star rating

### ⭐⭐⭐⭐⭐ Great product
*by Z***N on 6 September 2025*

This works really well in our hot tub, and keeps it fresh and clean. Comes in a secure tub that is waterproof and easily storable

### ⭐⭐⭐⭐ Value for money product
*by T***L on 14 August 2025*

Does a good job,mixes well before pouring into the hot tub

## Frequently Bought Together

- Clearwater PH Plus Increaser for Swimming Pool and Spa Treatment
- Clearwater TA Plus Alkalinity Increaser for Swimming Pool and Spa Treatment, White, 19.0 cm*9.7 cm*9.7 cm
- Clearwater Chlorine Granules for Hot Tub Spa and Swimming Pool Water Treatment for Rapid Disinfecting and Cleaning, 1 kg

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-04*