Best Water Treatment Pool Chlorine in 2026

Powerful chlorine shock treatment that is great for regular maintenance

Quickly eliminates algae, bacteria, and other harmful contaminants from your pool water

Main active ingredient is 68% Calcium Hypochlorite (Cal-Hypo) for quick sanitizing

Helps chlorine last longer

Reduces sun's impact on chlorine

Perfect for salt pools, new pools and pools that use liquid chlorine

BENEFITS: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity

FEATURES: Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

BENEFITS: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity

FEATURES: Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

24 bags (1-pound each)

Fast-Acting Quick-Dissolving Swimming Pool Sanitizer

Kills bacteria, controls algae, and destroys organic contaminants in pools

CLEAR WATER FOR SAFE SWIMMING - Swimming in crystal clear water does not mean your skin has to suffer. The granular chlorine is 99% sodium diclor making a relaxing swim not as harsh.

LONG LASTING - Dichlor resists UV light, lasting longer than other types of chlorinating supplies due to built in stabilizer for your swimming pool, hot tub, or spa.

DISSOLVES QUICKLY - Add 1 oz of this cleaning chemical to your pool for every 5,000 gallons your pool contains, daily for the best quick water treatment maintenance.

CLEAR WATER FOR SAFE SWIMMING - Swimming in crystal clear water does not mean your skin has to suffer. The granular chlorine is 99% sodium diclor making a relaxing swim not as harsh.

LONG LASTING - Dichlor resists UV light, lasting longer than other types of chlorinating supplies due to built in stabilizer for your swimming pool, hot tub, or spa.

DISSOLVES QUICKLY - Add 1 oz of this cleaning chemical to your pool for every 5,000 gallons your pool contains, daily for the best quick water treatment maintenance.

Fast Acting Chlorinating Granules for Hot Tub - Clean your water the right way - with AquaDoc's spa chlorine treatment. AquaDoc Chlorinating granules work fast to get clean & clear water for hot tubs & spas. Use AquaDoc's chlorine for spa and you'll get results.

The Chlorine Spa Owners Love - Whether it's a hot tub or spa, our hot tub chlorinating granules help you treat any build-up. Our granules make it easy to adjust dosing of the chlorine granules, making it easy to use our chlorine for hot tub.

Spa Maintenance friendly Chlorine Granules - With our Chlorinating Concentrate, using a hot tub sanitizer makes spa maintenance easy. Our chlorine granules help you with hot tub foam and are easy to use. The chlorine for hot tubs spa owners can rely on.

SIMPLE, SAFE & EFFECTIVE: The components in our chlorinating combination are fit into revolutionary pre-measured and self-dissolving tablets, effectively preventing exposure to unwanted components or powders of typical pool products and shock treatments. Simply drop the tablets into your pool or hot tub water or skimmer to keep the water clean and clear by filtering away all of the other stuff!

USES LESS HTH CHLORINE: These compressed, virtually hands-free pool treatment tablets contain the minimum amount of dangerous components and active minerals needed to keep your pool or spa water crystal clear. You may continue to check and control the alkaline levels with normal pH testing strips, as they will still detect the amount of chlorine dioxide in the water. Using these low-level chlorine tablets is also the ideal solution for preventing chlorine-related skin irritation.

KEEPS POOLS CLEAN: Our pool and spa chlorine tablets enter the purification cycle quickly, keeping the water sparkling clean. Keep your pool in tip-top condition with EcoOne tablets from Pacific Sands.

Fast Acting Pool Shock Treatment: Quickly boost the chlorine levels in your pool to remove algae and other contaminants for crystal clear pool water

Pro-Grade Cal Hypo Pool Shock for Regular Maintenance: Made of 68% calcium hypochlorite, with 65% available chlorine, regular doses of this chlorine shock treatment keep your pool clear all season long

Easy to Use: Each pound of chlorine shock comes in its own easy-to-use bag for quick, measure-free use

Chlorine Remover quickly removes harmful chemicals from tap water that are toxic to fish.

TotalPond Chlorine Remover is ideal when adding water to a pond, introducing new fish, opening in spring, and closing in winter.

A 16 oz. bottle treats up to 1,920 gallons of water

MULTI-PURPOSE: Raise the levels for chlorine, water hardness, and pH in your swimming pool giving you crystal clear water.

INCREDIBLY STRONG: Due to its high percentage of chlorine, Super Shock is very effective and efficient for a quick chlorine boost.

MIX BEFORE YOU FIX: Add this powder to a bucket of water before you add it to your pool. Add a 1 lb bag per 10,000 gallons of pool water.

BENEFIT: Shock treat, sanitize, clarify, and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product

FEATURES: Multi-use pool shock with Cal Hypo; Use weekly to solve 90% of pool water problems within 24 hours; Fast-acting and fast-dissolving

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

BENEFITS: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity

FEATURES: Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

Six single dose packets of FROG Maintain non-chlorine shock for hot tubs make ongoing hot tub maintenance EASY, no measuring needed!

Dissolves in 15 minutes, optimizes hot tub water – use one packet per 600 gallons

FROG Maintain is Cyanuric Acid Free, which ensures zero buildup – say goodbye to cloudy, smelly, irritating water that has to be drained and refilled constantly

Powerful, super-concentrated, residue-free, and fast-dissolving

Customers prefer chlorinating granules because it has little to no effect on pH levels

Can be used as a routine chlorine sanitizer or as a shock treatment

POOL SHOCK TREATMENT - Rx Clear’s Super Shock contains 68% calcium hypochlorite, yielding 65% available chlorine making this similar to Mega Shock, but slightly less concentrated. This shock will raise your free chlorine levels, water hardness, and pH levels giving you crystal clear water for a more enjoyable swimming experience. Due to its high percentage of chlorine, Super Shock is very effective and efficient for a quick chlorine boost.

MIX BEFORE YOU FIX - It is best to dilute Super Shock in a bucket of water before dispensing it around the pool which can prevent liner staining and cloudy water. Add this powder to a bucket of water before you add it to your pool. Add a 1 lbs bag per 10,000 gallons of pool water.

POOL SHOCK WITH ALGAECIDE - Kill the algae in your swimming pool by adding 3 bags of shock per 10,000 gallons of pool water. Rx Clear strives to provide quality products for a safer, cleaner, and more enjoyable swimming experience. When it comes to correcting your swimming pool, Rx Clear does it all giving you crystal clear water that fits your needs.

BRING SMART HOME TECHNOLOGY TO YOUR BACKYARD: Achieve safer pool water with state of the art technology.

EASY TO USE & GIVES EXPERT ADVICE: Simplify your pool care forever with automated monitoring and expert advice

NO HIDDEN FEES: No subscription fees. No hassle. Keep your pool protected around the clock.

MULTI-PURPOSE - This swimming pool shock works as a strong sanitizer, clarifier, and algicide for clear blue water.

EXTRA POWER - Due to its high percentage of chlorine, Mega Shock is a very effective treatment for a quick chlorine boost. The Rx Clear Mega shock packets are chlorinating essentials.

MIX BEFORE YOU FIX - Add this granular powder to a bucket of water before you begin dissolving it in your pool. Add a 1 lb bag per 10,000 gallons of pool water for smart maintenance.

Fast Acting Chlorinating Granules for Hot Tub - Clean your water the right way - with AquaDoc's spa chlorine treatment. AquaDoc Chlorinating granules work fast to get clean & clear water for hot tubs & spas. Use AquaDoc's chlorine for spa and you'll get results.

The Chlorine Spa Owners Love - Whether it's a hot tub or spa, our hot tub chlorinating granules help you treat any build-up. Our granules make it easy to adjust dosing of the chlorine granules, making it easy to use our chlorine for hot tub.

Spa Maintenance friendly Chlorine Granules - With our Chlorinating Concentrate, using a hot tub sanitizer makes spa maintenance easy. Our chlorine granules help you with hot tub foam and are easy to use. The chlorine for hot tubs spa owners can rely on.

BENEFIT: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity

FEATURES: Multi-functional shock treatment for weekly use; Use weekly to solve 90% of pool water problems within 24 hours

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

BENEFIT: Get the ultimate in pool care convenience with this all-in-one Cal Hypo formula; Sanitizes, controls algae, clarifies, softens pool water, and even prevents stain and scale to keep your pool clean, clear, and ready for summer fun

VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes and shock treats without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock

MULTIFUNCTIONAL, FAST ACTING: The all-in-1 pool treatment has built-in algae control, pool water clarifier, stain and scale preventer, water softener and filter aid—all with visible sparkling blue results in 24 hours

Fast Acting Pool Shock Treatment: Quickly boost the chlorine levels in your pool to remove algae and other contaminants for crystal clear pool water

Pro-Grade Cal Hypo Pool Shock for Regular Maintenance: Made of 68% calcium hypochlorite, with 65% available chlorine, regular doses of this chlorine shock treatment keep your pool clear all season long

Easy to Use: Each pound of chlorine shock comes in its own easy-to-use bag for quick, measure-free use