--- product_id: 725695914 title: "86121 Clarifying Concentrated Spa & Hot Tub Chemicals for Crystal Clear Water, 16 oz" brand: "hth spa" price: "€ 82.48" currency: EUR in_stock: true reviews_count: 5 category: "Hth Spa" url: https://www.desertcart.hr/products/725695914-86121-clarifying-concentrated-spa-and-hot-tub-chemicals-for-crystal store_origin: HR region: Croatia --- # 16 oz concentrated formula Compatible with all spa systems Boosts filtration efficiency 86121 Clarifying Concentrated Spa & Hot Tub Chemicals for Crystal Clear Water, 16 oz **Brand:** hth spa **Price:** € 82.48 **Availability:** ✅ In Stock ## Summary > 💦 Elevate your soak with spa water so clear, you’ll never want to get out! ## Quick Answers - **What is this?** 86121 Clarifying Concentrated Spa & Hot Tub Chemicals for Crystal Clear Water, 16 oz by hth spa - **How much does it cost?** € 82.48 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/725695914-86121-clarifying-concentrated-spa-and-hot-tub-chemicals-for-crystal) ## Best For - hth spa enthusiasts ## Why This Product - Trusted hth spa brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Concentrated Power:** Small 16 oz bottle packs a potent punch for long-lasting water clarity. - • **Crystal Clear Every Time:** Transforms dull spa water into sparkling clarity for a premium soak experience. - • **Optimized Filtration Boost:** Enhances your spa’s filtration system to keep water cleaner, longer. - • **Universal Spa Compatibility:** Works seamlessly with bromine, chlorine, and veganide systems—no spa left behind. - • **Trusted Spa Routine Essential:** Integrate with your regular HTH spa care for effortless, consistent results. ## Overview HTH 86121 Clarifying Concentrated Spa & Hot Tub Chemicals deliver a powerful, 16 oz formula designed to restore crystal-clear water by enhancing filtration efficiency. Compatible with all spa sanitizers including bromine, chlorine, and veganide, it’s a must-have for maintaining pristine spa conditions and elevating your relaxation routine. ## Description Product Description The HTH spa clarifier is a must have for spa and hot tub owners. This concentrated formula restores crystal clarity to dull water for a more relaxing immersion experience. Powerful cleanser is formulated to improve performance and improve filtration efficiency, keeping water clean and clear. HTH spa clarifier is compatible with all spas including spas that use bromine, chlorine, and veganide systems. For best results, use the HTH spa clarifier as part of your regular HTH spacial routine. With the HTH you can relax in the spa or hot tub Directions Adding a specified amount of HTH spa clarifier to your spa water for increased clarity and cleanliness. Follow the recommended usage guidelines for optimal results Review: Great Product - Wow works great and cheap. It made the water cloudier the day I put it in, but then next day its crystal clear. Looks even better than a fresh fill somehow. Review: product works as submitted - It works as labelled ## Features - BENEFITS: Restore crystal clarity in dull spa or hot tub water with this concentrated formula and enjoy a more relaxing experience - POWERFUL CLEANSER: Concentrated formula ideal for long periods of time soaking in spa or hot tub - IMPROVES PERFORMANCE: Increases filtration efficiency and keeps water clean - ALL SPA COMPATIBILITY: HTH Spa Clarifyer is ideal for all spas, including bromine, chlorine and veganides - ALL CLEAR WITH HTH: For best results, use the HTH Spa Clarifier as part of your normal HTH spa routine ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09RG87Z2B | | Brand | hth Spa | | Brand Name | hth Spa | | Customer Reviews | 4.7 out of 5 stars 1,529 Your Review | | Global Trade Identification Number | 00073187861214 | | Included Components | HTH Spa 86121 Clarifying Concentrated Spa & Hot Tub Chemicals for Crystal Clear Water, 16 oz | | Item Form | Liquid | | Item Type Name | Concentrated Spa & Hot Tub Chemicals for Crystal Clear Water | | Item Weight | 16 Ounces | | Manufacturer | Innovative Water Care | | Manufacturer Part Number | 86121 | | Model Number | 86121 | | Number of Items | 1 | | Product Benefits | Restores crystal clarity in your spa water and improves filtration efficiency and is compatible with all spas. Part of the regular HTH spa routine Product Benefits Restores crystal clarity in your spa water and improves filtration efficiency and is compatible with all spas. Part of the regular HTH spa routine See more | | UPC | 073187861214 | | Unit Count | 16.0 Count | ## Product Details - **Brand:** hth Spa - **Item Form:** Liquid - **Item Weight:** 16 Ounces - **UPC:** 073187861214 ## Images ![86121 Clarifying Concentrated Spa & Hot Tub Chemicals for Crystal Clear Water, 16 oz - Image 1](https://m.media-amazon.com/images/I/61lxdOVtgNL.jpg) ## Questions & Answers **Q: What are the ingredients ?** A: The HTH spa Clarifier contains cationic polymer, which clears dull, hazy water, improves filter efficiency. If you have additional questions, please feel free to reach out to our Consumer Engagement department at 866-484-7665. We're Here To Help, M-F, 9 AM - 7 PM, EST. **Q: What quantity to use for the small hot tub?** A: I have a 500 gallon hot tub and I use 2 oz a week **Q: Can you use this in a Inflatable hot tub?** A: Yes, you can use it in an inflatable hot tub, just be sure to use the correct dosage according to your volume of water. A clarifier basically chelates particles in your water so they can be filtered out through your pump. As long as your system is working properly, there should be not problem. **Q: This work good on inflatable hot tubs?** A: Yes. I use it in my inflatable and have for about 2 years. Works great. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Product *by C***T on April 15, 2026* Wow works great and cheap. It made the water cloudier the day I put it in, but then next day its crystal clear. Looks even better than a fresh fill somehow. ### ⭐⭐⭐⭐⭐ product works as submitted *by A***R on April 23, 2025* It works as labelled ### ⭐⭐⭐⭐⭐ Clear water *by D***C on February 10, 2026* Used another product originally and did not clear up water at all. Purchased and tried HTH Spa Clarifier. This product worked great. After first filtration cycle, there was a ring around the tub with much scum, assuming soaps and lotion in the water from suits and bodies. Wiped clean, changed filter and ran again. Same thing with ring around tub but water was very clear. Rinsed filter and ran one more time. Excellent results. Would recommend this product to make water crystal clear. Make sure to rinse filter or change out as noted above. ## Frequently Bought Together - HTH Spa 86121 Clarifier, Concentrated Spa & Hot Tub Chemical for Crystal Clear Water, 16 oz - HTH Spa 86134 Clear Chlorinating Sanitizer, Spa & Hot Tub Chemical Controls Bacteria and Algae, 2.25 lbs - HTH Spa 86135 Non Chlorine Shock Oxidizer, Spa & Hot Tub Chemical Clears Cloudy Water, 2.25 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.hr/products/725695914-86121-clarifying-concentrated-spa-and-hot-tub-chemicals-for-crystal](https://www.desertcart.hr/products/725695914-86121-clarifying-concentrated-spa-and-hot-tub-chemicals-for-crystal) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-21*