--- 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: "£16.06" currency: GBP in_stock: true reviews_count: 8 category: "Clearwater" url: https://www.desertcart.co.uk/products/49627018-ph-plus-increaser-1-kg-granules-for-hot-tub-spa store_origin: GB region: United Kingdom --- # 1 kg long-lasting granules Fast-acting in 4 hours Precise pH control 7.2–7.6 pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance **Brand:** clearwater **Price:** £16.06 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your spa game—because balanced water means flawless relaxation! ## 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?** £16.06 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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 - • **Rapid Results:** See your spa or pool water reach ideal pH levels within just 4 hours—no waiting, just relaxing. - • **Effortless pH Balance:** Easily maintain skin-friendly water with precise pH adjustment for ultimate comfort. - • **Hygienic & Crystal Clear:** Optimizes chlorine efficiency to eliminate harmful bacteria, keeping your water pristine and inviting. - • **Trusted Quality Assurance:** BISHTA approved and recommended by top brands like Bestway and Lay-Z-Spa for safe, reliable water care. - • **Simple & Beginner-Friendly:** Clear instructions and easy granule dissolution make routine water balancing a breeze for every user. ## Overview Clearwater pH Plus Increaser is a 1 kg granular powder designed to boost and maintain optimal pH levels (7.2–7.6) in hot tubs, spas, and above-ground pools. Fast-acting within 4 hours, it enhances chlorine effectiveness for superior hygiene and crystal-clear water. BISHTA approved and trusted by leading spa brands, it offers simple, reliable water balancing with long-lasting value. ## Description From the manufacturer ClearWater 1kg pH Plus/pH Minus is the best way to adjust a hot tub or pool's pH levels. Incorrect pH levels can impact the water quality and the experience for the user. The recommended pH balance is between 7.2 and 7.6. When pH levels drop below 7.2 acidity increases and pH increaser is needed. Applying the pH water treatment couldn’t be simpler. After dissolving the recommended amount of pH chemicals in warm water you simply add the solution to the water and this will increase the pH level. After a minimum of 4 hours, pH levels should be checked again and increased or decreased accordingly. 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: Perfect for the hot tub - Just what we needed for the hot tube, definitely recommend ## 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 | 145 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 9,782 Reviews | | EU Spare Part Availability Duration | 1 Years | | Global Trade Identification Number | 05031470039035 | | Included Components | CLEAR WATER 1KG PH INCREASER | | Item Form | Granular | | Item Type Name | PH Plus Increaser | | Item Weight | 1 Kilograms | | Item form | Granular | | Item weight | 1 Kilograms | | Manufacturer | ClearWater | | Manufacturer Part Number | CH0005 | | Model Number | CH0005 | | Number of Items | 1 | | Number of Packs | 1 | | Product benefits | pH increaser | | Unit Count | 1000.0 gram | ## Product Details - **Brand:** Clearwater - **Global Trade Identification Number:** 05031470039035 - **Item form:** Granular - **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/71x+szysAsL.jpg) ![pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance - Image 2](https://m.media-amazon.com/images/I/61gXc3A5y6L.jpg) ![pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance - Image 3](https://m.media-amazon.com/images/I/61mgzxV+0WL.jpg) ![pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance - Image 4](https://m.media-amazon.com/images/I/41SyZUQNhcL.jpg) ![pH Plus Increaser - 1 kg Granules for Hot Tub, Spa & Swimming Pool Water Treatment, Boosts pH & Improves Water Balance - Image 5](https://m.media-amazon.com/images/I/71IVFZstt6L.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Perfect for the hot tub *by J***E on 26 March 2026* Just what we needed for the hot tube, definitely recommend ### ⭐⭐⭐⭐ As advertised *by S***G on 9 November 2025* Does the job.!! ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/49627018-ph-plus-increaser-1-kg-granules-for-hot-tub-spa](https://www.desertcart.co.uk/products/49627018-ph-plus-increaser-1-kg-granules-for-hot-tub-spa) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-30*