The best Leisure Time hot tub chemicals depend on the job you need done: sanitizing water, oxidizing contaminants, or adjusting pH and alkalinity. The products below cover those different roles, so start by checking which type of sanitizer your spa uses and what your water test results call for. A shock treatment is not automatically a replacement for a sanitizer, and product directions should guide how much to use and when.
Table of Contents
Quick Comparison
| Product | Primary use | Best for |
|---|---|---|
| Leisure Time E5 Spa 56 Chlorinating Granules, 5 lb | Chlorine sanitizer | Regular chlorine-system care |
| Leisure Time RENU2 Renew Non-Chlorine Shock, 2.2 lb | Non-chlorine oxidizer | Routine oxidation and odor control |
| Leisure Time Spa Up, 2 lb | pH and alkalinity increaser | Water that tests low in pH or alkalinity |
| Leisure Time Spa 56 Chlorinating Granules, 2 lb | Chlorine sanitizer | A smaller-size chlorine option |
| Leisure Time RENU5 Renew Non-Chlorine Shock | Non-chlorine oxidizer | Regular shock treatment in a bulk-size container |
Our Picks: Best Leisure Time Hot Tub Chemicals reviews
1. Leisure Time E5 Spa 56: Best for Regular Chlorine Sanitizing
Leisure Time E5 is a granular chlorine sanitizer made for spas and hot tubs. Its active ingredient is sodium dichloro-s-triazinetrione dihydrate. The formula is described as quick-dissolving and is intended to help destroy organic contaminants and control algae as part of a chlorine sanitizing system.
The 5-pound container makes this the larger of the two Spa 56 options in this lineup. That may suit spa owners who use chlorine regularly and prefer to keep a larger supply on hand. It is not the right choice for a bromine-only or other non-chlorine sanitizing routine; match the product to your spa’s system and follow its instructions.
One important distinction: this is a sanitizer, while the RENU products below are non-chlorine oxidizers. Those products serve different roles, so they should not be treated as interchangeable. The larger container is convenient for ongoing use, but may be more than you need if your spa use is occasional.
Pros:
- Formulated for spas and hot tubs.
- Provides chlorine sanitation for compatible systems.
- Quick-dissolving granular formula.
- Larger container than the 2-pound Spa 56 option.
Cons:
- Only suited to chlorine sanitizing systems.
- May be a larger supply than occasional users need.
Verdict: Choose E5 if your spa uses chlorine and you want the larger of the two Spa 56 container sizes.
2. Leisure Time RENU2: Best Compact Non-Chlorine Shock
RENU2 is a chlorine-free oxidizer made with potassium peroxymonosulfate. It is intended to help clear cloudy water and reduce odors and contaminants such as soaps, deodorants, and oils. The product information also describes it as buffered to help prevent pH fluctuations.
This shock treatment is compatible with chlorine, bromine, ozone, and mineral purification systems. It can be used weekly as part of the Leisure Time Simple Spa Care program or after use with the Reserve & Renew system, according to the product directions. Compatibility does not mean it replaces your sanitizer: the product is specifically identified as not being a disinfectant.
The 2.2-pound container is a practical option if you want a non-chlorine shock without choosing the larger RENU5 container. Its main limitation is also its defining feature: it oxidizes contaminants but is not a stand-alone sanitizing product. Keep your spa’s usual sanitation routine in place.
Pros:
- Chlorine-free oxidizer for spa water maintenance.
- Compatible with several listed purification systems.
- Targets odors and contaminants from body-care products and oils.
- Buffered formula is designed to help limit pH fluctuations.
Cons:
- Not a disinfectant or replacement for sanitizer.
- Requires a separate compatible sanitation routine.
Verdict: RENU2 is a good fit if you need a non-chlorine oxidizer for a compatible spa system and want a smaller container than RENU5.
3. Leisure Time Spa Up: Best for Raising pH and Alkalinity
Spa Up is a granular water-balancing product with sodium bicarbonate as its active ingredient. It is designed to increase pH and alkalinity, not to sanitize or shock the water. Its purpose is to address a specific water-test result rather than serve as an all-in-one spa treatment.
The product can be poured directly into spa water and is listed as compatible with all sanitizers, including chlorine and biguanide. That broad compatibility makes it a useful balancing option for owners who need to raise their readings without changing their sanitizer type.
Because water balance depends on your test results, this is not a product to add just because it is part of a maintenance kit. Use it only when your readings and product directions call for it. If your pH or alkalinity is already in the appropriate range, a sanitizer or oxidizer may be the more relevant choice.
Pros:
- Raises both pH and alkalinity.
- Compatible with chlorine and biguanide sanitizers, among others.
- Granular format is described as fast-dissolving.
- Can be poured directly into spa water as directed.
Cons:
- Does not sanitize or oxidize spa water.
- Only useful when testing shows pH or alkalinity needs to increase.
Verdict: Pick Spa Up when your test results call for higher pH or alkalinity, not as a routine substitute for sanitizer or shock.
4. Leisure Time Spa 56, 2 lb: Best Smaller Chlorine Sanitizer
This 2-pound Spa 56 product is a chlorine sanitizer formulated for spas and hot tubs. Like the larger E5 option, it uses sodium dichloro-s-triazinetrione dihydrate and is described as quick-dissolving. It is intended to destroy organic contaminants and help control algae in a chlorine sanitizing system.
The listing also says it can be used as a shock treatment. Even so, its core role is chlorine-based sanitation, which makes it different from the non-chlorine RENU products. The smaller container may make more sense if you want Spa 56 but do not need the larger E5 size.
Its main drawback is compatibility: this product is specifically for chlorine sanitizing systems. If your spa uses bromine, ozone, minerals, or another setup, check the system instructions before selecting a chemical. As with any sanitizer, follow the label for application and handling.
Pros:
- Formulated specifically for spas and hot tubs.
- Provides chlorine sanitation and may be used as a shock treatment.
- Quick-dissolving granular formula.
- Smaller container than the 5-pound E5 option.
Cons:
- Limited to chlorine sanitizing systems.
- Not the right product for users seeking a chlorine-free oxidizer.
Verdict: Choose the 2-pound Spa 56 if you use a chlorine system and prefer a smaller container than the 5-pound E5.
5. Leisure Time RENU5: Best Bulk-Size Non-Chlorine Shock
RENU5 is a non-chlorine shock treatment intended to oxidize contaminants and help clear cloudy water and odors. The product information says it works with chlorine, bromine, ozone, and mineral purification systems. It is also described as targeting soaps, deodorants, oils, and microorganisms.
The product comes in a bulk-size 5-pound container, making it the larger RENU choice in this group. Its listed directions allow spa use 15 minutes after treatment; follow the product label and any spa-maker guidance rather than assuming that timing applies in every situation.
RENU5 is best understood as a shock oxidizer, not a replacement for your regular sanitizer. It may suit owners who use non-chlorine shock as part of their water-care routine and want a larger container. If you use shock only occasionally, the 2.2-pound RENU2 may be a more manageable size.
Pros:
- Non-chlorine shock that works with several listed purification systems.
- Designed to help reduce cloudiness, odors, and common contaminants.
- Bulk-size 5-pound container.
- Product information lists a 15-minute wait before spa use.
Cons:
- Does not take the place of your regular sanitizer.
- The larger container may not suit occasional users.
Verdict: Choose RENU5 if you want a larger supply of compatible non-chlorine shock and will keep using a separate sanitizer as required.
How to Choose Leisure Time Hot Tub Chemicals
Start with your sanitizer system
Check whether your spa uses chlorine, bromine, or another purification system before buying chemicals. Spa 56 is for chlorine sanitizing systems. RENU2 and RENU5 are non-chlorine oxidizers listed as compatible with several system types, while Spa Up is a water-balance product compatible with all sanitizers, including chlorine and biguanide. Confirm compatibility with your spa’s instructions.
Know the difference between sanitizer and shock
A sanitizer and an oxidizer have different jobs. Spa 56 is a chlorine sanitizer. RENU2 is specifically described as not being a disinfectant, and RENU5 is sold as a non-chlorine shock treatment. Do not assume that shock replaces your regular sanitation routine. Follow the product label and maintain the sanitizer required for your spa.
Use water test results to choose balancing products
Spa Up is intended to raise pH and alkalinity. It is not a general-purpose chemical, so use it when your water readings show that an increase is needed. Testing before you adjust the water can help you avoid adding a product that does not match the problem.
Choose a container size that fits your routine
The Spa 56 options come in 2-pound and 5-pound sizes, while RENU2 is 2.2 pounds and RENU5 is a bulk-size 5-pound container. A larger container may suit regular use, while a smaller one may be easier to manage if you use that product less often. Compare the size with your expected routine rather than choosing by container size alone.
Follow label directions and handle products carefully
Read each product’s directions before use, including its dosage, timing, and compatibility instructions. Do not mix spa chemicals together, and keep them stored and handled as directed on their labels. If your water has an issue you cannot identify, test it and check your spa-maker guidance before adding more chemicals.
Frequently Asked Questions
Can RENU2 or RENU5 replace my hot tub sanitizer?
No. RENU2 is identified as an oxidizer and not a disinfectant. RENU5 is a non-chlorine shock treatment. Keep using the sanitizer required by your spa system and follow its care instructions.
What is the difference between the two Spa 56 products?
Both are Leisure Time chlorine granules with the same listed active ingredient and are made for chlorine sanitizing systems. The main difference shown in the product information is container size: one is 2 pounds and the E5 option is 5 pounds.
Can I use Spa Up with a chlorine system?
The product information lists Spa Up as compatible with all sanitizers, including chlorine. It is designed to raise pH and alkalinity, so use it when your test results and the label directions indicate it is needed.
Is non-chlorine shock compatible with bromine systems?
RENU2 and RENU5 are listed as compatible with bromine systems, as well as several other purification systems. Check your product label and spa instructions for how to use shock with your specific setup.
Which product should I choose for cloudy water or odors?
RENU2 and RENU5 are described as non-chlorine oxidizers that help clear cloudy water and reduce odors and contaminants. They do not replace sanitizer, so maintain your regular sanitation routine as well.
Should I buy the smaller or larger container?
Consider how often you use the product and whether it matches your spa system. The smaller options may suit occasional use, while the larger Spa 56 and RENU5 containers may suit a routine that calls for more product. Follow the label for directions and storage.
Final Recommendation
For a chlorine sanitizing system, choose between the 2-pound Spa 56 and the larger 5-pound E5 based on how much you expect to use. For non-chlorine oxidation, RENU2 offers the smaller container and RENU5 the bulk-size option. Choose Spa Up only when water testing indicates that pH or alkalinity should be raised. The best Leisure Time hot tub chemical is the one that fits your sanitizer system and the specific water-care task you need to address.
