Top 10 Calcium Chloride Hot Tub – Swimming Pool Balancers

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1. Quality Producer Direct


Quality Producer Direct Calcium Hardness Increaser 1 Gallon Calcium Chloride Powder for Pools & Hot Tubs

Quality Producer Direct #ad - Great value: 1 gallon of Calcium Chloride Powder. Used to prevent Corrosion in Pools & Hot Tubs. Calcium chloride anhydrous Powder Increases Total Hardness of Pool Water. Lab-tested & Certified. Manufactured in the USA.
BrandQuality Producer Direct #ad
ManufacturerQuality Producer Direct #ad
Height7.5 Inches
Length7.47 Inches
Width7.47 Inches

2. SpaGuard


SpaGuard Spa Calcium Hardness Increaser 12 oz 3 Pack

SpaGuard #ad - Granula Calcium Chloride. Prevents corrosion of equipment and etching of plaster due to low calcium levels. Spaguard calcium hardness Increaser 12oz - 3 Pack.
BrandSpaGuard #ad
ManufacturerSpaGuard #ad
Weight2.5 Pounds
Part Number42258BIOx3



Leisure Time CB Calcium Booster Balancer for Spas and Hot Tubs, 32 fl oz

LEISURE TIME #ad - Use: one ounce increases hardness 7 ppm in 500 gallons of water. Benefits: raises water hardness to maintain a level of hardness between 150-400 ppm. Features: prevents corrosion and foam; Part of Leisure Time's Simple Spa Care program. Compatibility: Compatible with chlorine, bromine, ozone, and biguanide sanitizers. Compatible with chlorine, bromine, ozone and biguanide sanitizers. Includes: one 32-oz bottle of Leisure Time Calcium Booster. Prevents corrosion. One ounce increases hardness 7 ppm in 500 gallons of water.
ManufacturerLeisure Time #ad
Height9.5 Inches
Length3.12 Inches
Weight2.58 Pounds
Width3.12 Inches
Part NumberCB

4. Spa Essentials


12-Ounce, Spa Essentials 32534000 Calcium Hardness Increaser Granules for Spas and Hot Tubs

Spa Essentials #ad - Helps prevent corrosion Of Spa Equipment And Surfaces. Easy to Use. No assembly Required. Increases calcium Hardness Level In Spa Water.
BrandSpa Essentials #ad
ManufacturerRobelle Industries #ad
Height8 Inches
Length3 Inches
Weight0.75 Pounds
Width3 Inches
Part Number32534000
WarrantyReturns are not accepted on opened or used products and are subject to a 20% restocking fee

5. MAV AquaDoc


Calcium Increaser Spa Hardness Increaser & Calcium Booster for Hot Tubs, AquaDoc | Spa Calcium Hardness Increaser Hot Tub Owners Rely on, Spa Calcium Increaser & Hot Tub water hardener Spa Chemicals

MAV AquaDoc #ad - Avoid corrosion, etching, and staining - aquadoc's professional Grade Hot Tub Calcium increaser is your best defense against soft water in your hot tub or spa. Our spa hardness increaser easily works to raise your Calcium levels by 10ppm increments or more. Aquadoc's calcium Booster gets your hardness up.

How it works - aquadoc's hot tub calcium hardness increaser works to raise your water's hardness level to ensure properly balanced hot tub water. Always have a hot tub calcium booster ready and waiting. Make balancing your water easier & more cost effective with AquaDoc's calcium hardness increaser. The hardness increaser hot tub owners love - when it comes to Spa Chemicals calcium hardness increaser is a must have. 3 after determining hardness level goal, wait 20 minutes, add proper amount of increaser while equipment is on.

4 run filter for 1 - 2 hours, made in the USA - 1 Check your calcium levels, then retest water. Guard calcium levels from decreasing too low with our spa Calcium booster for hot tubs. Without hot tub chemicals calcium hardness can become unbalanced. Easy to use, 2 1 ounce of aquadoc's calcium increaser will boost water's hardness level by 10ppm. Our spa calcium hardness increaser is vital to ensuring proper water hardness levels in your hot tub.
BrandMAV AquaDoc #ad

6. Clorox


Clorox Pool&Spa 12204CLX Calcium Hardness Increaser, 4 lb, White

Clorox #ad - Increases low Total Hardness levels in swimming pool water. Ideal for plaster pools and soft water areas. Prevents pool surface damage. Prevents corrosion, etching, and staining. For best results, use with the Clorox Pool app. Power source Type: Manual.
BrandClorox #ad
ManufacturerClorox® Pool&Spa™ #ad
Height11.5 Inches
Length4.4 Inches
Weight4 Pounds
Width10 Inches
Part Number12204CLX

7. Hot Tub Things


Prevent Corrosion in Your Spa, Hot Tub Things Calcium Increaser 32 Ounce

Hot Tub Things #ad - America's #1 trusted Brand of Hot Tub Chemicals. Formulated exclusively for Hot Tubs And Made from the Purest Chemicals Available. Add a little calcium increaser regularly to protect your hot tub from corrosion caused by low calcium. Compare to Leisure Time Calcium Booster. Safety tested to Assure Quality, Guaranteed Performance.
BrandHot Tub Things #ad
ManufacturerHot Tub Things #ad
Height9 Inches
Length3 Inches
Weight2.1 Pounds
Width3 Inches
Part Number850511004222

8. Baqua Spa


BAQUA Spa 88825 Calcium Hardness Increaser Spa and Hot Tub Balancer, 14 oz

Baqua Spa #ad - Benefits: raises spa water to the recommended level of calcium hardness. Use: part of baqua spa's bromine-free and chlorine-free maintenance product line. Features: Bromine and chlorine free. Includes: one 14-oz container of BAQUA Spa Calcium Hardness Increaser. Compatibility: Works with all biguanide sanitizer systems.
BrandBaqua Spa #ad
ManufacturerInnovative Water Care #ad
Height2.44 Inches
Length2.44 Inches
Weight1 Pounds
Width6.2 Inches
Part Number88825

9. Robelle


White, 8-Pounds, Robelle 2808B Calcium Increaser

Robelle #ad - Ideal calcium hardness range 200 - 400ppm. Low calcium hardness level can cause corrosive water. Prevents the staining or etching of your pool's surface. Increases Water Hardness.
BrandRobelle #ad
ManufacturerRobelle #ad
Height10 Inches
Length10 Inches
Weight8 Pounds
Width10 Inches
Part Number2808B



Leisure Time A-02 Bright and Clear Clarifier for Spas and Hot Tubs 2 Pack, 1 quart

LEISURE TIME #ad - Made in United States. Helps spa filters perform at peak efficiency. Compatible with chlorine, bromine, ozone and biguanide sanitizers. Utilizes polymer action to remove suspended particles.
ManufacturerLeisure Time #ad
Height3 inches
Length6 inches
Weight6 Pounds
Width10 inches
Part NumberA--02