The 10 Best Chlorine Granules For Hot Tubs

This wiki has been updated 16 times since it was first published in October of 2018. Waiting around for large chlorine tablets to break down and disperse throughout your home spa system can really cut into your relaxation time, but these fast-acting granules are formulated to dissolve rapidly and are easily administered in just the right doses to maintain a healthy pH balance, destroy harmful bacteria and remove other contaminants that could muck up your hot tub. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki.

This wiki has been updated 16 times since it was first published in October of 2018. Waiting around for large chlorine tablets to break down and disperse throughout your home spa system can really cut into your relaxation time, but these fast-acting granules are formulated to dissolve rapidly and are easily administered in just the right doses to maintain a healthy pH balance, destroy harmful bacteria and remove other contaminants that could muck up your hot tub. When users buy our independently chosen editorial recommendations, we may earn commissions to help fund the Wiki.

1. Star Plus

If you enjoy a little downtime in your spa after a long day of work and don't want to worry about the hassles of cleaning it daily, Star Plus (around $16) works around the clock to keep your jets flowing freely and your relaxation station crystal clear and free of bacteria.

Dissolves completely
Easy to follow directions
Also suitable for pools

2. Rendezvous Sani-Spa

Rendezvous Sani-Spa (around $32) may be just what you need to help maintain a clean, healthy unit that you can use at your leisure. It only takes half an ounce per 500 gallons to achieve your desired results and keep everything in sparkling condition.

Multi-packs are available
Sturdy handle for carrying
Compatible with mineral purifiers

3. Brilliance Spa

There's nothing like a good shock treatment to make sure cooties and discoloration won't spoil the pleasure of a revitalizing dip when you need it. Brilliance Spa (around $47) does just that, dissolving quickly and getting right to work to sanitize and disinfect those soothing depths.

Can serve as regular chlorination
Disperses rapidly
Locking lid for safety

4. Hot Tub Things

When setting up your own personal home retreat, Hot Tub Things (around $58) offers you everything you'll need to get it up and running in one handy kit. Composed of the purest chemicals available, it'll have you all set for a restorative, massaging soak in no time at all.

Includes 50 test strips
Laminated instruction sheet
Well priced for what it contains

5. SpaGuard Concentrate

SpaGuard Concentrate (about $19) needs no preamble or preparation for its fast-acting treatment to work; just add the prescribed dose directly to the water while the pump is running to reliably sanitize, oxidize, and remove contaminants from your system.

Can also be used in small pools
Easy one-step application
Stabilized dichlor formulation

6. Leisure Time Spa 56

As part of an easy-to-follow regimen, regular doses of Leisure Time Spa 56 (about $29) will help maintain clean, clear, sanitized water you'll look forward to plunging into at the end of a challenging day at work, or the beginning of a long, relaxing weekend.

Comes in 2- or 5-lb containers
Can be used as a shock treatment
Won't upset ph balance

7. Kem-Tek All-In-One

Kem-Tek All-In-One (around $87) is suitable for everyday treatments and won't leave any ugly calcium deposits on the walls. Available in 22-1/2- and 45-pound tubs, it's great for long-term use by occasional bathers or several months for more frequent dippers.

Concentrated and long-lasting
Resists chlorine burn-off from sun
The container is not waterproof

8. Spa Essentials Concentrate

With Spa Essentials Concentrate (around $20), your unit can be sanitized and oxidized with no need to purchase extra products. It can be sprinkled directly into the system where it dissipates and starts working automatically, so you can get to soaking sooner.

No need to pre-dissolve it
Fast-acting formula
Not for use as a shock treatment

9. Clorox Xtra Blue

For all-purpose antimicrobial and algaecide conditioning, add Clorox Xtra Blue (around $24) through a skimmer or directly to your saltwater or chlorinated pool. It's formulated to reduce eye irritation and chlorine odor while eliminating organic contaminants from your system.

Comes in uv-resistant packaging
Available in 6- or 22-lb sizes
Not suitable for indoor jacuzzis

10. Spa Choice

Although it may be a struggle to get it open, the heavy-duty container that houses Spa Choice (appx. $35) has a tight seal to keep the moisture out and chemical odors in. A little goes a long way, so you can disinfect hundreds of gallons a mere teaspoon at a time.

Keeps algae growth in check
Downloadable user's guide
No dosing scoop included

Last updated by Misty Alder

Born and raised in the American Deep South, Misty's career in elder care took a sharp left turn when she was swept away to the land of Robin Hood by her very own Merry Man. She's a coffee-swilling master of stitch-witchery with a magical touch in the kitchen and a neverending stream of Disney gag reels playing in her head. A certified nursing assistant by trade and a toy aficionado by choice, some intense parenting ensured she was well versed in gardening, carpentry and electrical engineering by the time she entered grade school. Her culinary artistry, tool-wielding wizardry, and skill with needle and thread were honed over nearly four decades in the kitchens, workrooms, and outdoor spaces of family, friends, and clients. Voracious reading took care of the rest.

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