Crafted as a powerful, chlorine-free oxygen-based oxidizer, this 2.2 lb spa shock targets organic contaminants like oils, lotions, soaps, and environmental debris to prevent film, odors, and dull water. When used after every use or weekly, it breaks down accumulated contaminants that can strain sanitizer systems and affect water clarity, while also protecting calcium hardness and chlorine levels—so it never increases total hardness or stabilizers. Gentle on spa surfaces, equipment, and seals, it maintains crystal-clear water without harsh chemicals or abrasive effects. Packaged in a resealable 2.2 lb container, it offers excellent value and convenience for regular spa maintenance. Trusted formula from Hot Tub Things—America’s #1 spa chemical brand—is safety-tested and backed by user praise for restoring shine and clarity.

Contains cationic polymeric flocculant that aggregates microscopic contaminants into filter-trappable clumps. Works rapidly—just add 1 oz per 500 gal during filtration for wildly improved clarity within a single 4–6 min circulation cycle. Completely non-foaming and spa-safe, designed to work seamlessly with chlorine, bromine, ozone, salt, or mineral sanitizers. American-made and rigorously tested by Hot Tub Things—the brand trusted for chemical purity, safety, and consistent performance. Promotes healthier water and longer filter life by removing particles before they cloud surfaces or clog plumbing. Compact 16 oz bottle with ~173 positive reviews confirms consistent satisfaction and trustworthy results.

Formulated with powerful, chlorine-free oxygen-based oxidizer, this granulated shock effectively eliminates organic contaminants introduced by bathers, rain, and wind—without raising chlorine or creating combined chlorine. Regular use under the specified dose keeps spa water clean with sparkling clarity, simplifying weekly maintenance and making water easier to balance. Gentle on spa surfaces—won’t affect calcium hardness or stabilizer levels—and compatible with acrylic, seals, equipment, and all sanitizer systems. Packaged in a reusable 1 lb jar with resealable lid, this shock offers convenient, accurate dosing and long shelf life. Trusted Hot Tub Things formula: cleaning-savvy users say, “you’ll wish you’d discovered this product years ago!” for keeping spa water pristine and inviting.

This 5 lb jar contains high-purity sodium dichloro granules, engineered specifically for spa and hot tub use in warm water. Designed to kill algae, bacteria, viruses, and break down organic residues quickly, it delivers a powerful sanitizer action while dissolving completely within minutes—no pre-dissolving necessary. Use in floating dispensers or add directly into the spa with the pump running; targeting 3–5 ppm residual chlorine ensures clean, safe water. The UV-stabilized formula prevents rapid breakdown from sun exposure, maintaining potency even in outdoor spas. Backed by Hot Tub Things’ rigorous safety-testing, this trusted formula surpasses many competitors, offering professional-grade performance at a homeowner-friendly price. A highly reviewed product (over 172 reviews), it's praised for keeping spa water comfortable, odor-free, and visibly sparkling.

Contains high-quality sodium bicarbonate designed to increase both pH and total alkalinity simultaneously in spa water, reducing pH bounce and improving chemical stability. Raises total alkalinity to the preferred range of 80–150 ppm and lifts pH to 7.2–7.8, protecting equipment from corrosion and preventing surface etching. Enhances sanitizer effectiveness—balanced water ensures chlorine or bromine work properly, avoiding cloudy water and reducing odor and eye irritation. Ideal for all spa and hot tub types (chlorine, bromine, salt, mineral, and ozone systems), use after chemical shock or spa refills. Packaged in a convenient 2 lb resealable jar—enough for multiple treatments and easy to store. Expert brand – America’s #1 spa chemical manufacturer, safety-tested, and trusted by spa professionals and consumers alike for reliable water balance.

Designed for spa-specific clear water maintenance, this 32 oz clarifier uses a high-efficiency cationic polymer to bind microscopic particles together into larger aggregates, making them fully filterable. Fast-acting formula restores sparkling clarity within hours, improving both the appearance and feel of water. Compatible with chlorine, bromine, salt, and mineral systems, it integrates seamlessly into regular spa maintenance routines. Each bottle offers ample supply for a full season—using 2 oz per 500 gal. Regular use reduces filter strain and helps maintain optimal water quality during periods of heavy usage. Backed by the Hot Tub Things brand's safety-tested reputation, it's formulated to be spa-safe, non-foaming, and easy to use.

Chelating formula suspends metal ions (iron, copper, calcium) that cause staining, scaling, and heater corrosion—protecting spa surfaces and plumbing. Use as a preventive measure during fill-up or to correct existing scale and discoloration; safe for use in hot tubs, jetted tubs, and swim spas. Crafted by America’s #1 spa chemical brand, it’s safety-tested, pure, and formulated specifically for spa use. Easy dosing: Add 16 fl oz during fill or 24 fl oz for heavy metal issues; run pump for thorough circulation. Helps maintain crystal-clear water, efficient heating, and pristine acrylic finish—minimizing equipment wear and cleaning needs.

Contains high-purity sodium dichlor, specifically tailored for spa and hot tub use in warm water environments. Rapidly eliminates algae, bacteria, viruses, and organic contaminants, dissolving fully within minutes—no pre-mixing required. Use in floating feeders or directly into the spa while the pump runs; maintain a 3–5 ppm free chlorine residual for effective sanitation and crystal-clear water. UV-stable formulation retains strength even when used in outdoor spas under the sun. Packaged in a 2 lb resealable jar—compact for easy storage and sufficient for regular maintenance. Highly rated and trusted—known for reliable performance, ease of use, and excellent sanitizer strength in warm water conditions.

Chlorine-free oxidizing formula based on oxygen for powerful yet gentle organic removal. Weekly or after-use treatment targets contaminants like lotions, soaps, sweat, and environmental debris to prevent film and dull water. Balances spa chemistry by eliminating organic matter, making it easier to maintain sanitizer levels and preventing chlorine odor without raising calcium hardness or stabilizer. Gentle on surfaces and spa components—safe for acrylics, seals, equipment, and no abrasive impact. Generous 5‑lb container offers excellent value; typically treat every 1–2 weeks depending on usage. Highly rated by users, praised for restoring spa sparkle and clarity with effortless application.

Precision liquid formula raises spa water calcium hardness efficiently, helping prevent corrosive “hungry” water that can damage heaters, plumbing, and metallic parts. Ideal for weekly use or fresh fills in spas with low or softened water, restoring balance without overshooting to scale-forming levels. Helps minimize foam, cloudiness, and sanitizer demand by maintaining stable hardness—essential for optimal sanitizer effectiveness. Compatible with all hot tub sanitizer types—including chlorine, bromine, saltwater, and mineral systems—simplifying your chemical routine. Convenient 32 oz bottle with marked dosing lines makes it easy to add precise amounts based on spa volume. Backed by Hot Tub Things’ quality assurance, safety-tested for spa use and formulated without harsh fillers—trusted by professionals and DIYers.

Quick foam elimination: Just a capful in circulating spa water instantly disrupts and removes unsightly foam caused by lotions, soaps, detergents, and organic debris. Pure chemistry, spa-safe: Made with the purest hot tub–grade ingredients, this defoamer is non-silicone and won’t harm acrylic, vinyl, jets, or plumbing systems. Trusted & tested: Backed by Hot Tub Things—America’s #1 spa chemical brand—and safety-tested for quality and performance. Preventive & proactive: Use anytime foam appears during cleanup, especially after shampoo, guest usage, or aromatherapy sessions. Easy application: Shake well, pour one capful onto the water surface while jets are running, wait 30 minutes—and foam disappears. Repeat once more if needed, then clean filters for peak results.

Concentrated cartridge-cleaning formula engineered to lift oils, lotions, soaps, and grease from pleated spa filters, restoring their original filtering power. Ideal for a deep soak—simply submerge the filter in cleaner and water overnight for maximum ease and effectiveness. Contains powerful emulsifiers and wetting agents that break down organic buildup without harsh abrasives. Compatible with chlorine, bromine, ozone, salt, and mineral sanitizing systems, making it safe for all spa types. Regular use helps improve circulation efficiency and reduces strain on the pump and heater components. Helps control bacterial growth by removing contaminants that can harbor microbes, supporting healthier spa water. Made by Hot Tub Things—America’s #1 trusted spa chemical brand—formulated specifically for spa filters. Convenient dime-sized bottle (8.82″ × 3.19″ × 3.11″, 2.23 lb) fits easily into maintenance kits and storage areas.

Spray-on Instant Cartridge Cleaner dissolves stubborn oils, lotions, grease, and mineral buildup from pleated cartridge filters—no soaking, scrubbing, or buckets required. Scientifically engineered to match traditional soak cleaners: “just spray on and rinse off” delivers sparkling clean filters in 5 minutes—perfect for spring cleaning or seasonal resets. Safety-tested by Hot Tub Things (America’s #1 spa chemical brand), it’s fully compatible with chlorine, bromine, ozone, and salt sanitizers—protecting spa water chemistry. Regular use helps prolong filter lifespan, reduce pump energy costs, and maintain strong water flow and clarity between deep cleans. Comes in a convenient 32 oz spray bottle with a cleaning cycle recommended every 4–6 weeks, or before each refill—keeping your spa ready for peak performance.

Raises both pH and total alkalinity to ideal levels for spa water stability and comfort. Prevents corrosion of spa components and extends the life of heaters, jets, and plumbing. Helps maintain sanitizer efficiency by keeping water within the proper chemical range. Fast-dissolving granular formula for easy and precise dosing. Safe for use with all types of sanitizers, including chlorine, bromine, saltwater, and mineral systems. Reduces cloudy water and skin/eye irritation caused by low pH or unbalanced water. Packaged in a 1 lb resealable container with clear dosing instructions. Made in the USA and trusted by spa owners and professionals alike.

Exclusive formula to dissolve organics, oils, dirt, minerals, and biofilm that accumulate in jet lines and internal plumbing. Designed as preventative maintenance—use before draining or quarterly—to stop flow restrictions and pump inefficiencies. Fully compatible with all sanitizer types (chlorine, bromine, ozone, biguanide), ensuring safe use in any spa or jetted tub. Proudly made by Hot Tub Things—America’s #1 spa chemical brand—and safety-tested for quality and reliability. Backed by 152+ reviews and a 4.5-star rating—users report “restored jet pressure” and “easier maintenance” after use. Comes in a convenient 16 fl oz bottle (approx. 7.5″ × 2.3″), weighing ~1.12 lb—fits standard spa care kits.

Made from high-purity sodium dichloro granules that dissolve rapidly in warm spa water to maintain a sanitizer level of 3–5 ppm for optimal disinfection. Acts as both a sanitizer and oxidizer, killing bacteria, algae, and viruses while breaking down organic contaminants. Convenient direct application: add roughly ½ oz per 500 gal of spa water while the pump runs; adjust dose frequency based on usage—daily for heavy use, weekly for moderate use. Suitable for floating dispensers or manual dosing; no need for pre-dissolving, saving time and effort. UV-stabilized to maintain strength even when spa is uncovered, ensuring consistent performance. Compatible with chlorine, bromine, saltwater, and mineral systems for flexible spa care routines. Packaged in a resealable high-density polyethylene jar to maintain freshness and purity over time. Backed by Hot Tub Things’ trusted, safety-tested formula designed specifically for spa applications.

Specially designed granular blend to reduce elevated pH and total alkalinity simultaneously—ideal for water above 7.8 pH or 150 ppm alkalinity. Helps prevent scale buildup, protect heaters and pumps, eliminate cloudy water, and reduce skin and eye irritation by stabilizing chemical balance. Packed with high-purity ingredients and safety-tested by Hot Tub Things, ensuring consistent performance and spa safety. Granular form allows precision dosing—just add recommended dose based on test results, run pump for 15–20 minutes, then wait 2 hours before retesting; adjust as needed. Convenient 1.25 lb resealable bag provides multiple treatments—perfect for season-long spa water care.

Provides consistent and long-lasting bromine-based sanitation Ideal for users sensitive to chlorine and strong odors Slow-dissolving tablets designed for floaters or dispensers Controls bacteria and algae growth in hot tubs and spas Each 5 lb bucket offers multiple weeks of water treatment Leaves water clean, clear, and gentle on skin and eyes Compatible with most spa and hot tub bromine systems Manufactured and packaged in the USA

Gentle, foam-free formula engineered for spa pillows and headrests—lifts oils, dirt, and makeup without harsh chemicals that can crack surfaces or cause excessive foam. Alcohol-free to preserve the natural rubber and vinyl surfaces of pillows, preventing premature drying and cracking. Ideal for use on spa and swim spa covers, pool furniture, patio cushions, and more—one product across all accessory surfaces. Quick and easy application: spray onto cloth or surface, wipe clean, and rinse—it’s ready to use again immediately without disrupting your spa’s foam balance. Enhances water clarity and comfort by eliminating residues that can interact with sanitizers and contribute to water foaming. Comes in a convenient 32 fl oz bottle—enough for seasonal cleaning and maintenance of multiple accessories.

Prevents mineral buildup and waterline scale caused by calcium, magnesium, and other hard water deposits. Protects spa surfaces, plumbing, and heating elements from corrosion and costly damage. Effective against metal stains caused by dissolved iron, copper, and manganese. Ideal for use at startup (fresh fill) and as part of a weekly spa care routine. Compatible with all sanitizer types including chlorine, bromine, saltwater, and biguanide systems. Helps maintain clear, sparkling water by binding minerals before they can precipitate. Easy-pour 32 oz bottle with accurate measurement markings for hassle-free dosing. Made in the USA and trusted by spa professionals for reliable performance.

Contains 98% bromochloro-5-5 active ingredient with minimal binding agents Low-odor alternative to chlorine, preserves swimwear and spa surfaces Ideal for use in floating dispensers or inline brominators Each tablet is approximately 1″ in diameter for controlled dissolution Meets strict quality standards—safety tested and performance guaranteed

Designed as a full water-care startup bundle for new hot tub fills, this kit includes everything you need for the first two months of use. Contains 1 lb of high-quality chlorine granules as the primary sanitizer, along with 1.25 lb each of pH & alkalinity up and down granules to maintain optimal water chemistry. Includes 1 lb of oxidizing spa shock (potassium monopersulfate) to reset sanitizer and eliminate organic contaminants and odor. Features 1 pint of spa clarifier to help trap microscopic particles in the filter and maintain water clarity. Comes with 1 pint of metal remover (“Metal Out”) to sequester iron, copper, and other metals commonly found in refill water. Includes a 50‑strip test kit and a waterproof owner's guide to help you learn proper testing and dosing routines quickly. Packaged in a sturdy box from an American-made chemical line, the kit delivers trusted, professional-grade performance. Ideal for spa owners who prefer straightforward, all‑in‑one solutions to set up and maintain clean spa water with confidence. A popular pick with 244 five-star reviews, praised for its convenience and reliable startup results.