Search  for anything...
hth Spa

HTH Spa 86121 Clarifier, Concentrated Spa & Hot Tub Chemical for Crystal Clear Water, 16 oz

  • Based on 1,627 reviews
Condition: New
Checking for the best price...
$8.05 Why this price?
Save $2.95 was $11.00

Buy Now, Pay Later

As low as $2 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Aug 24 – Aug 25
Order within 5 hours and 21 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: No Size


Features

  • BENEFIT: Use this concentrated formula to bring crystal clarity back to dull spa or hot tub water and enjoy a more relaxing experience
  • STRONG CLEANSER: Concentrated formula that will ensure your spa or hot tub is ideal for soaking for a long time
  • IMPROVES PERFORMANCE: Raises filter efficiency to keep your water staying clean
  • COMPATIBLE WITH ALL SPAS: HTH Spa Clarifier is great for all spas, including bromine, chlorine and biguanide
  • YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Spa Clarifier as part of your regular HTH Spa care routine

Description

The HTH Spa Clarifier is a must-have for any spa or hot tub owner. This concentrated formula helps to bring crystal clarity back to dull water, ensuring a more relaxing soaking experience. The strong cleanser is formulated to improve performance and raise filter efficiency, keeping your water clean and clear. HTH Spa Clarifier is compatible with all spas, including those that use bromine, chlorine, and biguanide systems. For best results, use HTH Spa Clarifier as part of your regular HTH Spa care routine. With HTH, you're all clear and ready to relax in your spa or hot tub!

Brand: hth Spa


Item Weight: 16 ounces


Item Form: Liquid


Product Benefits: Restores crystal clarity to spa water, improves filter efficiency, compatible with all spas, part of regular HTH Spa care routine See more


UPC:


Brand Name: hth Spa


UPC: 073187861214


Global Trade Identification Number: 14


Number of Items: 1


Unit Count: 16 Fluid Ounces


Included Components: HTH Spa 86121 Clarifier, Concentrated Spa & Hot Tub Chemical for Crystal Clear Water, 16 oz


Item Type Name: Concentrated Spa & Hot Tub Chemical for Crystal Clear Water


Manufacturer: Innovative Water Care


Model Number: 86121


Manufacturer Part Number: 86121


Manufacturer Warranty Description: Warranty


Item Form: Liquid


Product Benefits: Restores crystal clarity to spa water, improves filter efficiency, compatible with all spas, part of regular HTH Spa care routine


Item Weight: 16 ounces


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 24 – Aug 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great product
Size: No Size
This stuff is fantastic!! Works well and definitely worth the money. Helps remove algae. Helps keep the water crystal clear!
Reviewed in the United States on May 28, 2026 by Britni
    • Great Product
Size: No Size
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.
Reviewed in the United States on April 15, 2026 by Cat
    • Works as described and is a good price
Size: No Size
Follow directions and works as described.
Reviewed in the United States on June 23, 2026 by styler
    • Works
Size: No Size
This stuff works,gathers up all the very small things in the water and makes them visible to net. It clumps the particles together.
Reviewed in the United States on September 19, 2025 by TheresaC
    • Back to sparkling water
Size: No Size
Works as advertised. Use it when water starts to look a little murky and cleans it right up.
Reviewed in the United States on June 26, 2026 by JacksonW
    • Pool staff
Size: No Size
Works very well.
Reviewed in the United States on June 25, 2026 by Anabella p.
    • Clear water
Size: No Size
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. ... show more
Reviewed in the United States on February 10, 2026 by DC
    • Clears spa water almost instantly
Size: No Size
Works as intended
Reviewed in the United States on May 14, 2026 by Norm

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...