--- product_id: 408297883 title: "HTH Spa Alkalinity Up" brand: "hth" price: "฿1144" currency: THB in_stock: true reviews_count: 13 category: "Hth" url: https://www.desertcart.co.th/products/408297883-hth-spa-alkalinity-up store_origin: TH region: Thailand --- # Stabilizes pH fluctuations Raises alkalinity 80-120 ppm Protects spa surfaces & equipment HTH Spa Alkalinity Up **Brand:** hth **Price:** ฿1144 **Availability:** ✅ In Stock ## Summary > 🛁 Elevate your soak game—because your spa deserves the best balance! ## Quick Answers - **What is this?** HTH Spa Alkalinity Up by hth - **How much does it cost?** ฿1144 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/408297883-hth-spa-alkalinity-up) ## Best For - hth enthusiasts ## Why This Product - Trusted hth brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Spa Longevity Booster:** Safeguard your investment by protecting pumps, filters, and heaters from corrosive damage. - • **Precision Alkalinity Control:** Maintain spa water alkalinity within the ideal 80-120 ppm range for crystal-clear comfort. - • **Effortless Maintenance Routine:** Pair with HTH Spa Test Strips for quick, twice-weekly water checks and hassle-free spa care. - • **Universal Sanitizer Compatibility:** Seamlessly works with bromine, chlorine, and biguanide systems—no compromises. - • **pH Stability for Ultimate Comfort:** Keep pH levels balanced to prevent skin and eye irritation during every soak. ## Overview HTH Spa 86131 Alkalinity Up is a 1.25 lb spa chemical designed to precisely raise and maintain total alkalinity between 80-120 ppm, stabilizing pH levels to ensure clear, comfortable water. Compatible with all major sanitizers, it protects spa surfaces and equipment from damage, prolonging their lifespan. Trusted by thousands with a 4.7-star rating, it’s the essential, easy-to-use solution for professional-grade spa water balance. ## Description Low alkalinity levels in spa water can cause undue damage to surface and equipment. HTH Spa Alkalinity Up not only raises the total alkalinity in your pool water, but it also helps keep the pH levels from fluctuating. This helps prolong the life of spa surfaces and equipment, like filter systems, and ensures healthy, comfortable water by protecting against skin and eye irritation. HTH Spa Alkalinity Up is compatible with all sanitizers including bromine, chlorine and biguanide. How To Use: Use HTH Spa Test Strips to test your spa water. If the total alkalinity level measures below 80 ppm, apply HTH Spa Alkalinity Up directly to your spa water. Refer to on-pack instructions for the correct dosage. Allow water to circulate for 1-3 hours. Test and repeat as needed to maintain total alkalinity levels between 80 and 120 ppm. About HTH Spa Care: For generations, HTH has been leading the way in smart spa care. We do the chemistry so you can just take it easy. From the very first day you open your spa, HTH is here to help maintain and problem solve. Our complete range of simple-to-use, no-nonsense products empower you to balance, sanitize and treat your spa—it’s everything you need and nothing you don't. There is nothing more relaxing than taking it easy in sparkling, clean water. With HTH, your spa is always ready when you are. ## Features - BENEFIT: Easily raise the total alkalinity levels in your spa water to ensure it remains clear, clean, and healthy - CREATES MORE COMFORTABLE WATER: Keeps the pH levels in range, which helps protect against skin and eye irritation - PROLONGS THE LIFE OF YOUR SPA: Helps prevent damage to spa surfaces and equipment (pumps, filters, and heaters) - COMPATIBLE WITH ALL SANITIZERS: HTH Spa Alkalinity Up works great with bromine, chlorine and biguanide systems - YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Spa Test Strips twice a week to test, balance and maintain total alkalinity levels between 80 and 120 ppm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09JZWWJTC | | Best Sellers Rank | #8,280 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #38 in Swimming Pool Balancers | | Brand | HTH | | Brand Name | HTH | | Customer Reviews | 4.7 out of 5 stars 763 Reviews | | Included Components | HTH Spa 86131 Alkalinity up, | | Item Form | Powder | | Item Type Name | Spa & Hot Tub Chemical Raises Alkalinity, Stabilizes pH Fluctuation | | Item Weight | 0.01 Ounces | | Manufacturer | Innovative Water Care | | Manufacturer Part Number | 86131 | | Manufacturer Warranty Description | Warranty | | Model Number | 86131 | | Number of Items | 1 | | Product Benefits | Protects Against Skin Irritation | | UPC | 073187861313 | | Unit Count | 20.0 Ounce | ## Images ![HTH Spa Alkalinity Up - Image 1](https://m.media-amazon.com/images/I/61XnRqBb72L.jpg) ![HTH Spa Alkalinity Up - Image 2](https://m.media-amazon.com/images/I/71DSLiur+2L.jpg) ![HTH Spa Alkalinity Up - Image 3](https://m.media-amazon.com/images/I/612zbxLgzOL.jpg) ![HTH Spa Alkalinity Up - Image 4](https://m.media-amazon.com/images/I/71G15s1ghrL.jpg) ![HTH Spa Alkalinity Up - Image 5](https://m.media-amazon.com/images/I/81i+0730VKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by P***T on April 19, 2026* ### ⭐⭐⭐⭐⭐ Review *by C***C on July 20, 2025* ### ⭐⭐⭐⭐⭐ Review *by T***E on October 21, 2025* ## Frequently Bought Together - HTH Spa 86131 Alkalinity up, Spa & Hot Tub Chemical Raises Alkalinity, Stabilizes pH Fluctuation, 1.25 lbs - HTH Spa 86133 pH Up, Spa & Hot Tub Chemical Raises pH, Prevents Corrosion, 2 lbs - HTH Spa 86132 pH Down, Spa & Hot Tub Chemical Lowers pH, Prevents Scale, 2.5 lbs --- ## 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.th/products/408297883-hth-spa-alkalinity-up](https://www.desertcart.co.th/products/408297883-hth-spa-alkalinity-up) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-05-05*