---
product_id: 479776901
title: "HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals)"
brand: "hth"
price: "€ 19.37"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/479776901-hth-spa-care-alkalinity-up-for-spas-and-hot-tubs
store_origin: NL
region: Netherlands
---

# HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals)

**Brand:** hth
**Price:** € 19.37
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals) by hth
- **How much does it cost?** € 19.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/479776901-hth-spa-care-alkalinity-up-for-spas-and-hot-tubs)

## Best For

- hth enthusiasts

## Why This Product

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

## Description

HTH Spa Care Alkalinity Up, Raises Alkalinity, Stabilizes pH Fluctuation, 1.25 lbs  Low alkalinity levels in spa water can cause undue damage to surfaces and equipment. HTH® Spa Alkalinity Up not only raises the total alkalinity in your Spa & Hot Tub 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 HTH® Spa Alkalinity Up 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.    Keeps total alkalinity and ph levels in range   Protects against skin & eye irritation   Protects spa equipment & surfaces   Creates more comfortable water   Prolongs the life of your spa   Compatible with all sanitizers    About HTH&reg; Spa Care    For generations, HTH&reg; 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 or hot tub, HTH&reg; 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&reg;, your spa is always ready when you are.  Creates more comfortable water    Keeps the pH levels in range, which helps protect against skin and eye irritation.    Prolongs the life of your spa & hot tub    Helps prevent damage to spa surfaces and equipment (pumps, filters and heaters).    Compatible with all sanitizers    HTH&reg; Spa Alkalinity Up works great with bromine, chlorine and biguanide systems.    You're all clear with HTH&reg;     For best results, use HTH&reg; Spa Test Strips twice a week to test, balance and maintain total alkalinity levels between 80 and 120 ppm.

## Images

![HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals) - Image 1](https://i5.walmartimages.com/asr/4a11cd01-da30-4af6-9184-55abc1bd5abd.b2b9c0dcf905dba24f297da50bd74fbe.png)
![HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals) - Image 2](https://i5.walmartimages.com/asr/5f5fd889-9f6f-40ba-9755-2c6228f2bbc5.4acbf20875c0df1764808d24ed29b9b1.png)
![HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals) - Image 3](https://i5.walmartimages.com/asr/b70d8e82-d341-42b7-a1f7-a5e13f363aca.2591c15a9fd5fe6f7525d1460dcc286a.png)
![HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals) - Image 4](https://i5.walmartimages.com/asr/8a13651a-f7f8-4c6c-ba1d-28f2146c7e7f.8c029b8be5ef92c05d8122a6e1b564f7.png)
![HTH Spa Care Alkalinity Up for Spas & Hot Tubs, 1.25lb (pool chemicals) - Image 5](https://i5.walmartimages.com/asr/bf3b58ef-bc0c-4894-a406-d5cdf2947f59.7ecf3457d1992bd19fafeaedd18b7449.png)

---

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-15*