The Best Hot Tub Chemicals — Oxidizers and Sanitizers

Updated by Lynda Stevens

You’ll have many problems if you don’t use the best hot tub chemicals because they help sanitize your tank and prevent the growth of various organisms.

dead leaves and other debris isn’t enough because your hot tub may deteriorate quickly. Worse, you and your family may contract a tub-related illness because you fail to clean it regularly.

If you want to prevent these things from happening, you have to ensure that you use the appropriate spa chemicals.

I prefer the Leisure Time Renew Non-Chlorine Shock because it’s useful as an oxidizer. It removes organic matter and other contaminants to keep the spa water fresh-smelling, clear, and clean. It’s also suitable for many purification systems.

The Best Hot Tub Chemicals to Use Are:

ProductDetails
1. Leisure Time Renew Non-Chlorine Shock

  • Non-chlorine shock oxidizer
  • Compatible with mineral, bromine, chlorine, and ozone purification system
  • Prevents pH fluctuations
  • Gets rid of oils, soaps, microorganisms, and deodorants
  • Prevents chloramine buildup
  • Tub ready for use after 15 minutes
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2. SpaGuard Enhanced Spa Shock

  • pH buffered and multipurpose
  • Fast-acting with long-lasting results
  • Compatible with many spa systems, such as chlorine, ozone, and ionization
  • Powerful shock treatment to eliminate contaminants
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3. Spa Choice Chlorine Granules for Spas and Hot Tubs

  • Stabilized spa with 56% Chlorine
  • Kills bacteria and controls algae
  • Dissolves completely and quickly
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4. Spa Essentials Chlorinating Concentrate Granules for Spas and Hot Tub

  • Quick dissolving and fast-acting
  • Granular stabilized chlorinator
  • Sanitizes and oxidizes
  • 97% sodium dichloro-s-triazinetrione formula
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5. Oh Yuk Healthy Hot Tub Cleaner

  • Improves water clarity and quality
  • Improves filtration and removes contaminants
  • Extends the life of the hot tub
  • Removes nasty residues and reduces foaming and chemical usage
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6. Pool & Spa Anti Foam Concentrate Hot Tub Chemical

  • Water-based silicone formula
  • Doesn’t affect the water chemistry or leave a cloudy or oily residue
  • Extra concentrated and compatible with saltwater, chlorine, etc
  • 30-day hassle-free money-back guarantee
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1. Leisure Time Renew Non-Chlorine Shock

Leisure Time offers top-notch and effective spa chemicals. Its Renew Non-Chlorine oxidizer is excellent in eliminating organic matter like oils, cosmetics, chloramine, ammonia, and other contaminants.

It dissolves quickly to keep the water clear, clean, and smelling fresh. You can use it with mineral, ozone, bromine, and chlorine sanitizer systems. Its formulation includes DuPont Oxone and potassium monopersulfate compound.

I also like that it doesn’t change the pH level of the water. However, unlike its competitors, it requires more ounces of the product.

Specs

  • Non-chlorine shock oxidizer
  • Compatible with mineral, bromine, chlorine, and ozone purification system
  • Prevents pH fluctuations
  • Gets rid of oils, soaps, microorganisms, and deodorants
  • Prevents chloramine buildup
  • Tub ready for use after 15 minutes
  • Eliminates chlorine odors and contaminants

Pros

  • Economical
  • Easy to use

Cons

  • Requires more ounces of solution

If you’re searching for a non-chlorine oxidizer for your hot tub, you may try the Leisure Time Renew Non-Chlorine Shock to eliminate organic matter and other contaminants.

It maintains the clarity, cleanliness, and fresh smell of spa water. You’ll also like that it includes a user’s guidebook, so you can use it conveniently. Moreover, it’s compatible with all purification systems.

Overall Rating – 4.6

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2. SpaGuard Enhanced Spa Shock

I like the SpaGuard Enhanced Spa Shock because it works well with my hot tub. It’s efficient in acting as a flocculent, clarifier, and oxidizer. It gets rid of stubborn contaminants and foul-smelling odors without changing the pH balance.

It restores the water sparkle and reduces chemical use. Its chlorinating shock includes 58.2% sodium and suitable for ionization, chlorine, and ozone systems.

Specs

  • pH buffered and multipurpose
  • Fast-acting with long-lasting results
  • Compatible with many spa systems, such as chlorine, ozone, and ionization
  • Powerful shock treatment to eliminate contaminants

Pros

  • Cost-effective and efficient
  • Works within 15 minutes
  • Easy to use

Cons

  • Not effective with grease
  • May cause allergies to sensitive skin
  • May not work with some bromine systems
  • Less stable at high temperatures because it’s chlorine-based

You may try the SpaGuard Enhanced Spa Shock to clean the water in your spa. It’s cost-effective because you only need three tablespoons of the solution for a 50-gallon tank.

It removes contaminants to keep your spa water sparkling and safe. You don’t have to wait for hours before you use the chemical for shock treatment.

Overall Rating – 4.8

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3. Spa Choice Chlorine Granules for Spas and Hot Tubs

Spa Choice Chlorine Granules is a sanitizer with 56% available chlorine. It’s powerful in killing pathogens and bacteria and stops the proliferation of algae.

It dissolves completely and quickly, and if you stick to the recommended quantities, it won’t irritate the skin or leave a sharp smell. Stabilized chlorine lasts long, and UV rays don’t degrade it. However, I had a difficult time opening the large container.

I like that it acts fast in ensuring my hot tub is clean and tidy. The chlorine granules eliminate bacteria and stop the growth of algae. I was able to download an easy to follow instruction and technical specifications. I discovered, however, that it’s not suitable for spa tubs and plastic tubs, and it doesn’t keep the chlorine balance in many situations.

Specs

  • Stabilized spa with 56% Chlorine
  • Kills bacteria and controls algae
  • Dissolves completely and quickly

Pros

  • Fast cleaning process
  • Easy to follow instructions
  • Value for money

Cons

  • Not for plastic spa tubs
  • Difficult to open container
  • No measuring cup included

The Spa Choice Chlorine Granules for Spas and Hot Tubs effectively cleans tub water. If you’re searching for the best hot tub chemicals, you may try this product because it cleans the spa water immediately to get rid of organic contaminants, kill bacteria, and maintain the pH level. You only need a teaspoon or 0.17 ounces for 500-gallon spa water.

Overall Rating – 4.6

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4. Spa Essentials Chlorinating Concentrate Granules for Spas and Hot Tub

Spa Essentials Chlorinating Concentrate Granules works as an oxidizer and sanitizer. I like it because it’s easy to use and dissolves quickly. The solution killed pathogens, and the stabilized chlorine maintained the water odorless, pure, clean, and disinfected. It consists of 97% sodium dichlor and is suitable for Jacuzzis and hot tubs.

The concentrated formula is cost-efficient because I don’t need to buy multiple products. It didn’t irritate my eyes and skin, but for people with sensitive skin, this product may cause skin and eye irritation. However, it’s quite expensive compared to other chemicals.

Specs

  • Quick dissolving and fast-acting
  • Granular stabilized chlorinator
  • Sanitizes and oxidizes
  • 97% sodium dichloro-s-triazinetrione formula

Pros

  • No need to pre-dissolve
  • Multipurpose

Cons

  • Expensive
  • May cause eye and skin irritation
  • Chlorine smell
  • Less stable in high temperatures

If you want an easy to use hot tub treatment product, you may opt for the Spa Essentials Chlorinating Concentrate Granules because it’s both an oxidizer and sanitizer.

You simply have to add it to the spa water and let it do its job. Its one-step sanitization formula is excellent for busy people who don’t want any tedious work to keep their hot tubs clean and sparkling.

This formula is suitable for outdoor spas, and you may want to skip using it if you don’t like a strong chlorine odor. However, the Spa Essential Chlorinating Concentrate Granules is effective in killing and controlling bacteria immediately. It’s also an oxidizer, so you don’t have to purchase two separate products.

Overall Rating – 4.7

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5. Oh Yuk Healthy Hot Tub Cleaner

Regular cleaners may damage jetted tubs or clean them improperly. Fortunately, I came across Oh Yuk Healthy Hot Tub Cleaner and discovered that it improved the water quality of my hot tub.

It removed contaminants and increased filtration. Eventually, it improves the longevity of my tub and decreases chemical usage and foaming. I like the product because it keeps my spa water sterile and clean.

It removes any unpleasant odors and works exceptionally against residues, scums, and foams. It even reduces mineral scaling. Because it maintains proper bromine and chlorine levels, it also kills bacteria and prevents the growth of algae. I only have a minor complaint; a 16-ounce bottle is good for two cleanings.

Specs

  • Improves water clarity and quality
  • Improves filtration and removes contaminants
  • Extends the life of the hot tub
  • Removes nasty residues and reduces foaming and chemical usage

Pros

  • Easy to clean
  • Pleasant smelling
  • Fast-acting and effective
  • Value for money

Cons

  • 16-ounce bottle is good for two cleanings only

The Oh Yuk Healthy Hot Tub Cleaner is my go-to spa cleaner because of its unrivaled cleaning action. You may want to try it if you’re searching for an all-purpose formula that also leaves your tub sweet-smelling. It’s non-toxic and worth your money.

Overall Rating – 4.6

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6. Pool & Spa Anti Foam Concentrate Hot Tub Chemical

Pool & Spa Defoamer Concentrate is a water-based silicone formula that gets rid of foam in spas, decorative fountains, and pools. I like that it doesn’t change the water chemistry and doesn’t leave any oil residue.

It’s cost-effective because I only have to add up to two ounces for every 10,000 gallons of water to remove the foam. However, like any other product, I have to use it frequently, so the foaming reaction won’t recur.

Specs

  • Water-based silicone formula
  • Doesn’t affect the water chemistry or leave a cloudy or oily residue
  • Extra concentrated and compatible with saltwater, chlorine, etc
  • 30-day hassle-free money-back guarantee

Pros

  • Value for money
  • Easy to use
  • Powerful and efficient
  • Versatile defoamer
  • Easy to follow instructions

Cons

  • Foams return if you don’t use it regularly

Pool & Spa boasts of an extra concentrated silicone formula that won’t only leave your hot tub foamless but cloudless as well. If you wish to experience its power, you may purchase it and see it for yourself.

The water-based solution doesn’t affect the effectiveness of other compounds like chlorine. This defoamer will leave your spa water sparkling clean without any oil and soap residue that can make the spa water cloudy.

Overall Rating – 4.5

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Buying Guide for Hot Tub Chemicals

If you want to use the best hot tub chemicals, you must first determine the type of treatment that your hot tub needs. You have to use test strips to check the calcium, pH, alkalinity, and sanitizer levels of the water. I lined up a buying guide to help you make the right decision.

Ease of Use

Regular water treatment is crucial if you want to maintain your hot tub. Treating the spa water must be an effortless and swift process.

Efficient and straightforward to use chemicals have definite instructions that you can follow.

Speed

Some formulas require that you wait for hours for the chemicals to work. However, some treatments produce rapid actions. You don’t have to wait for hours to enjoy your hot tub.

Storage

You must ensure that you store the hot tub chemicals properly, especially if you have kids in the house. The container must be kid-proof and well packaged.

Safety

It’s also essential that you choose the right chemicals for your spa. You must always check the label because some ingredients may cause allergies. Also, you must follow the instructions on the proper use of the product.

Tub Type

Before you buy the best hot tub chemicals, you must first know if they are suitable for the model and make of your spa. Many manufacturers include the recommended chemical for their products in the user’s manual.

Appropriate Chemicals for the Hot Tub

Sanitizer

Warmth and moisture promote the growth of bacteria, fungi, and other microorganisms. A sanitizer is a disinfectant that kills pathogens and bacteria. Bromine and chlorine are its most prevalent types.

Shock

A shock is an oxidizer that removes contaminants after heavy use or if you haven’t used it for a while. It is suitable for cleaning the filter and pipe, and it prevents the water from turning smelly and cloudy.

pH Balance

The ideal pH level of spa water is between 7.2 and 7.8. If it’s too acidic and low, the spa water will corrode your plumbing and your tub finish. Too alkaline and high will result in scaling and buildup of cloudy water.

Total Alkalinity

The ideal level of alkalinity is from 80 to 120 ppm, and it ensures the effectiveness of the sanitizer and affects the hardness and pH level of the spa water.

A pH reducer lessens the alkalinity and pH level, while sodium bicarbonate raises it. Moreover, sodium bisulfate, calcium filters, and softened water reduce the level of alkalinity.

Calcium Hardness

The ideal range of calcium hardness is between 150 to 400 ppm. If you maintain the pH and alkalinity levels, you also control the water hardness.

If the calcium hardness is extremely low, the water will get the materials from plumbing and tub parts that will ultimately deteriorate them.

If the level of calcium is too high, foaming and scaling will build up. A calcium booster will raise the calcium level, while scale defenders, softened water, and calcium filters will reduce it.

Water Clarifiers

A water clarifier and anti-foam chemical get rid of pollutants that cause foaming and cloudy water. A polymer results in the coagulation of tiny particles for straightforward filtration.

Algae Prevention

Sanitizers and shock treatments prevent algae growth; yet, you may need an algaecide if it becomes an issue.

Final Thoughts

I recommend the Leisure Time Renew Non-Chlorine Shock as one of the best hot tub chemicals because it’s excellent in getting rid of organic matter and other contaminants. You have to add it to the spa water to maintain the cleanliness, clarity, and fresh smell of the tub.

It does not affect the pH level of the water, and you can use your hot tub after 15 minutes. As a non-chlorine oxidizer, it’s compatible with all purification systems, and you can easily follow the instructions to achieve maximum effectiveness.

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