Results for "hardness plus"(18)
Uses item details. Price when purchased online
Puri Tech Powder Pool Chemicals 20 lb Calcium Hardness Increaser Plus for Pools & Spas $42.59
$4259
current price $42.59Puri Tech Powder Pool Chemicals 20 lb Calcium Hardness Increaser Plus for Pools & Spas
124.8 out of 5 Stars. 12 reviews
Free shipping, arrives in 3+ days
Puri Tech Powder Pool Chemicals 10 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas $29.97
$2997
current price $29.97Puri Tech Powder Pool Chemicals 10 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas
Free shipping, arrives in 3+ days
In 100+ people's carts HTH Pool Care Shock Advanced — Granules, 6 Pack (6 lb total) — Pool Shock Treatment for Weekly Pool Sanitizing $29.97 $5.00/lb
In 100+ people's carts
Sponsored
$2997
current price $29.97$5.00/lb
Options from $6.14
HTH Pool Care Shock Advanced — Granules, 6 Pack (6 lb total) — Pool Shock Treatment for Weekly Pool Sanitizing
89534.6 out of 5 Stars. 8953 reviews
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In 200+ people's carts HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination $39.97 Was $44.99 $7.99/lb
In 200+ people's carts
Sponsored
Now$3997
current price Now $39.97, Was $44.99$44.99
$7.99/lb
Options from $10.97
HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination
62044.5 out of 5 Stars. 6204 reviews
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Puri Tech Powder Pool Chemicals 15 lb Calcium Hardness Increaser Plus & Spas Increases Calcium Hardness Levels $28.60
$2860
current price $28.60Puri Tech Powder Pool Chemicals 15 lb Calcium Hardness Increaser Plus & Spas Increases Calcium Hardness Levels
23 out of 5 Stars. 2 reviews
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PurTest Iron Hardness Plus Test PB Format $22.22
$2222
current price $22.22PurTest Iron Hardness Plus Test PB Format
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Iron Hardness Plus Kit 77702 $18.45
$1845
current price $18.45Iron Hardness Plus Kit 77702
14 out of 5 Stars. 1 reviews
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Clorox Pool&Spa Calcium Hardness Increaser, 5 lbs (For Pool Use) $26.99
$2699
current price $26.99Clorox Pool&Spa Calcium Hardness Increaser, 5 lbs (For Pool Use)
334.3 out of 5 Stars. 33 reviews
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Advantis GLB 71251A 15lb Calcium Hardness Up in Pouch $37.74
$3774
current price $37.74+$9.98 shipping
Advantis GLB 71251A 15lb Calcium Hardness Up in Pouch
Shipping arrives in 3+ days
Durachlor Hardness Increaser 4 lb Pool Chemicals, 1 Pack $26.32
$2632
current price $26.32Durachlor Hardness Increaser 4 lb Pool Chemicals, 1 Pack
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Puri Tech Powder Pool Chemicals 10 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas $29.97
Sponsored
$2997
current price $29.97Puri Tech Powder Pool Chemicals 10 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas
Free shipping, arrives in 3+ days
Puri Tech Powder Calcium Hardness Increaser 40 lbs Calcium Chloride for Swimming Pools $65.88
Sponsored
$6588
current price $65.88Puri Tech Powder Calcium Hardness Increaser 40 lbs Calcium Chloride for Swimming Pools
354.7 out of 5 Stars. 35 reviews
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HTH 4 lbs Granule Calcium Hardness Increaser - Pack of 3 $56.07
$5607
current price $56.07HTH 4 lbs Granule Calcium Hardness Increaser - Pack of 3
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Pool Central 10 Lb - Haviland Durachlor Swimming Pool Water Hardness Increaser $33.71 Was $38.75 $3.37/lb
Now$3371
current price Now $33.71, Was $38.75$38.75
$3.37/lb
Pool Central 10 Lb - Haviland Durachlor Swimming Pool Water Hardness Increaser
25 out of 5 Stars. 2 reviews
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hth Calcium Hardness Increaser, 4 Lb. $23.70
$2370
current price $23.70hth Calcium Hardness Increaser, 4 Lb.
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Mineraluxe UML09744 19 oz Calcium Plus Water Treatment $25.27
$2527
current price $25.27Mineraluxe UML09744 19 oz Calcium Plus Water Treatment
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CPDI Champion Pool Shock 1-Gal 12.5% Commercial-Grade Liquid Chlorine, 4 Pk $49.49 Was $79.99
Sponsored
Now$4949
current price Now $49.49, Was $79.99$79.99
Options from $35.00
CPDI Champion Pool Shock 1-Gal 12.5% Commercial-Grade Liquid Chlorine, 4 Pk
2254.6 out of 5 Stars. 225 reviews
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In 50+ people's carts In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria, Algae, and Microorganisms- 24 X 1 Pound 25266 2X12X1 See price in cart
In 50+ people's carts
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See price in cart
In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria, Algae, and Microorganisms- 24 X 1 Pound 25266 2X12X1
7884.5 out of 5 Stars. 788 reviews
Free shipping, arrives in 3+ days
Other options to consider(126)
HTH Pool Care Calcium Hardness Increaser — Granules, 4 lb — Pool Chemical to Raise Calcium Hardness and Improve Water Balance $8.39 Was $15.99 $2.10/lb
Now$839
current price Now $8.39, Was $15.99$15.99
$2.10/lb
HTH Pool Care Calcium Hardness Increaser — Granules, 4 lb — Pool Chemical to Raise Calcium Hardness and Improve Water Balance
1824.8 out of 5 Stars. 182 reviews
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Best seller Clorox Pool&Spa Calcium Increaser Pool Water Balancers Granules, 4 lb Bag $11.82 $2.96/lb
Best seller
2 options
Available in additional 2 options$1182
current price $11.82$2.96/lb
Options from $11.82 – $35.46
Clorox Pool&Spa Calcium Increaser Pool Water Balancers Granules, 4 lb Bag
5004.6 out of 5 Stars. 500 reviews
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In 100+ people's carts HTH Pool Care Shock Advanced — Granules, 6 Pack (6 lb total) — Pool Shock Treatment for Weekly Pool Sanitizing $29.97 $5.00/lb
In 100+ people's carts
Sponsored
$2997
current price $29.97$5.00/lb
Options from $6.14
HTH Pool Care Shock Advanced — Granules, 6 Pack (6 lb total) — Pool Shock Treatment for Weekly Pool Sanitizing
89534.6 out of 5 Stars. 8953 reviews
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Delivery as soon as 6am
Shipping arrives today
Pickup as soon as 7am
In 200+ people's carts HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination $39.97 Was $44.99 $7.99/lb
In 200+ people's carts
Sponsored
Now$3997
current price Now $39.97, Was $44.99$44.99
$7.99/lb
Options from $10.97
HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination
62044.5 out of 5 Stars. 6204 reviews
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Free shipping, arrives today
Free pickup as soon as 7am
In The Swim Calcium Hardness Increaser 25 lbs Y7210 $59.99
2 sizes
Available in additional 2 sizes$5999
current price $59.99In The Swim Calcium Hardness Increaser 25 lbs Y7210
794.7 out of 5 Stars. 79 reviews
Free shipping, arrives in 3+ days
Robelle Calcium Plus - 10 Lbs
3 options
Available in additional 3 optionsRobelle Calcium Plus - 10 Lbs
Free shipping, arrives in 3+ days
Puri Tech Powder Calcium Hardness Increaser 40 lbs Calcium Chloride for Swimming Pools $65.88
$6588
current price $65.88Puri Tech Powder Calcium Hardness Increaser 40 lbs Calcium Chloride for Swimming Pools
354.7 out of 5 Stars. 35 reviews
Free shipping, arrives in 3+ days
6 lbs PH Minus Granule Non Chlorine Calcium Hardness Increaser - Pack Of 8 $186.53 Was $238.51
Now$18653
current price Now $186.53, Was $238.51$238.51
+$9.98 shipping
6 lbs PH Minus Granule Non Chlorine Calcium Hardness Increaser - Pack Of 8
Shipping arrives in 3+ days
Rx Clear Calcium Hardness Increaser for Swimming Pools, 4 lbs $21.95
3 sizes
Available in additional 3 sizes$2195
current price $21.95Options from $21.95 – $49.99
Rx Clear Calcium Hardness Increaser for Swimming Pools, 4 lbs
664.7 out of 5 Stars. 66 reviews
Free shipping, arrives in 3+ days
Clorox Calcium Hardness Increaser Pool Water Balancers, 4 lbs
Clorox Calcium Hardness Increaser Pool Water Balancers, 4 lbs
23 out of 5 Stars. 2 reviews
Free shipping, arrives in 3+ days
Puri Tech Powder Calcium Hardness Increaser 40 lbs Calcium Chloride for Swimming Pools $65.88
Sponsored
$6588
current price $65.88Puri Tech Powder Calcium Hardness Increaser 40 lbs Calcium Chloride for Swimming Pools
354.7 out of 5 Stars. 35 reviews
Free shipping, arrives in 3+ days
CPDI Champion Pool Shock 1-Gal 12.5% Commercial-Grade Liquid Chlorine, 4 Pk $49.49 Was $79.99
Sponsored
Now$4949
current price Now $49.49, Was $79.99$79.99
Options from $35.00
CPDI Champion Pool Shock 1-Gal 12.5% Commercial-Grade Liquid Chlorine, 4 Pk
2254.6 out of 5 Stars. 225 reviews
Free shipping, arrives in 3+ days
Doheny's Calcium Plus | Raise Your Calcium Hardness Level | Pro-Grade Granular/Flake Calcium Chloride | Low Calcium Hardness Levels Lead to Corrosion & Staining On Pool Surfaces and Fixtures | 5 LB $26.99
3 sizes
Available in additional 3 sizes$2699
current price $26.99Options from $26.99 – $230.39
Doheny's Calcium Plus | Raise Your Calcium Hardness Level | Pro-Grade Granular/Flake Calcium Chloride | Low Calcium Hardness Levels Lead to Corrosion & Staining On Pool Surfaces and Fixtures | 5 LB
534.5 out of 5 Stars. 53 reviews
Free shipping, arrives in 3+ days
Spapur 16 oz Chemical Hardness Increaser
Spapur 16 oz Chemical Hardness Increaser
Free shipping, arrives in 3+ days
Calcium Hardness Increaser Pouch $57.23
$5723
current price $57.23Calcium Hardness Increaser Pouch
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Pool Breeze 8086044 8 lbs Calcium Hardness Increaser Granule, Pack of 4 $96.93
$9693
current price $96.93Pool Breeze 8086044 8 lbs Calcium Hardness Increaser Granule, Pack of 4
Free shipping, arrives in 3+ days
O-ACE-SIS 8191850 6 lbs PH Minus Granule Non Chlorine Calcium Hardness Increaser - Pack Of 8 $192.71
$19271
current price $192.71O-ACE-SIS 8191850 6 lbs PH Minus Granule Non Chlorine Calcium Hardness Increaser - Pack Of 8
Free shipping, arrives in 3+ days
Leisure Time 8098077 1 lbs Granule Calcium Hardness Increaser $16.99
$1699
current price $16.99Leisure Time 8098077 1 lbs Granule Calcium Hardness Increaser
Free shipping, arrives Wed, Jun 10
Swimming Pool Calcium Hardness Booster Granular Formula 220 LB Resealable Bags $112.01
$11201
current price $112.01+$9.99 shipping
Swimming Pool Calcium Hardness Booster Granular Formula 220 LB Resealable Bags
Shipping arrives in 3+ days
FROG SooTHe Calcium Total Hardness Increaser for Hot Tubs & Swim Spas - 2 lb Bottle with TruDose Measuring Cap for Easy Maintenance & Balancing - 2 Pack $27.90
$2790
current price $27.90FROG SooTHe Calcium Total Hardness Increaser for Hot Tubs & Swim Spas - 2 lb Bottle with TruDose Measuring Cap for Easy Maintenance & Balancing - 2 Pack
Free shipping, arrives in 3+ days
In 50+ people's carts In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria, Algae, and Microorganisms- 24 X 1 Pound 25266 2X12X1 See price in cart
In 50+ people's carts
Sponsored
See price in cart
In The Swim Pool Shock 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water Defends Against Bacteria, Algae, and Microorganisms- 24 X 1 Pound 25266 2X12X1
7884.5 out of 5 Stars. 788 reviews
Free shipping, arrives in 3+ days
Puri Tech Powder Pool Chemicals 10 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas $29.97
Sponsored
$2997
current price $29.97Puri Tech Powder Pool Chemicals 10 lb Calcium Hardness Increaser Plus for Swimming Pools & Spas
Free shipping, arrives in 3+ days
Pool Mate Calcium Increaser for Swimming Pools $32.99
2 sizes
Available in additional 2 sizes$3299
current price $32.99Pool Mate Calcium Increaser for Swimming Pools
84.5 out of 5 Stars. 8 reviews
Free shipping, arrives in 3+ days
FROG SooTHe Calcium Total Hardness Increaser for Hot Tubs & Swim Spas - 2 lb Bottle with TruDose Measuring Cap for Easy Maintenance & Balancing - 1 Pack $13.95
$1395
current price $13.95FROG SooTHe Calcium Total Hardness Increaser for Hot Tubs & Swim Spas - 2 lb Bottle with TruDose Measuring Cap for Easy Maintenance & Balancing - 1 Pack
Free shipping, arrives in 3+ days
Pool Choice Increase Calcium - 25 Lbs
Pool Choice Increase Calcium - 25 Lbs
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O-ACE-sis Granule Calcium Hardness Increaser 4 lb $115.98
$11598
current price $115.98O-ACE-sis Granule Calcium Hardness Increaser 4 lb
Free shipping, arrives in 3+ days
Quality Producer Direct Calcium Hardness Increaser 1 Gallon Calcium Chloride Powder for Pools & Hot Tubs $26.99
$2699
current price $26.99Quality Producer Direct Calcium Hardness Increaser 1 Gallon Calcium Chloride Powder for Pools & Hot Tubs
Free shipping, arrives in 3+ days
Puri Tech Chemical 10 lb Calcium Hardness Increaser & 10 lb Alkalinity Increaser $33.72
$3372
current price $33.72Puri Tech Chemical 10 lb Calcium Hardness Increaser & 10 lb Alkalinity Increaser
Free shipping, arrives in 3+ days
Calcium Hardness Increaser - 4 lbs Pail $27.97
$2797
current price $27.97Calcium Hardness Increaser - 4 lbs Pail
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Puri Tech Powder Chemical 20 lb Calcium Hardness Increaser & 20 lb Alkalinity Increaser for Swimming Pools $64.67
$6467
current price $64.67Puri Tech Powder Chemical 20 lb Calcium Hardness Increaser & 20 lb Alkalinity Increaser for Swimming Pools
Free shipping, arrives in 3+ days
Best seller HTH Green to Blue Pool Shock Kit — Granules (Form), 4 lb — Pool Shock Treatment for Algae Removal and Water Clarification $28.44
Best seller
Sponsored
$2844
current price $28.44HTH Green to Blue Pool Shock Kit — Granules (Form), 4 lb — Pool Shock Treatment for Algae Removal and Water Clarification
20704.2 out of 5 Stars. 2070 reviews
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Best seller In The Swim 3 Inch Stabilized Chlorine Tablets - Swimming Pools (10, 25, 50 lbs) $164.99 Was $164.99
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Sponsored
$16499
current price $164.99, Was $164.99$164.99
Options from $34.99
In The Swim 3 Inch Stabilized Chlorine Tablets - Swimming Pools (10, 25, 50 lbs)
27664.6 out of 5 Stars. 2766 reviews
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EZ Spa Calcium Hardness Increaser 1lb EZSC1 $17.79
$1779
current price $17.79EZ Spa Calcium Hardness Increaser 1lb EZSC1
25 out of 5 Stars. 2 reviews
Free shipping, arrives in 3+ days
Leisure Pool Calcium Hardness Increaser (Calcium Chloride 83-87%) - 25 lb. Pail $74.99
$7499
current price $74.99Leisure Pool Calcium Hardness Increaser (Calcium Chloride 83-87%) - 25 lb. Pail
15 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days
O-ACE-sis 4 lbs Calcium Hardness Increaser- Pack of 8 $116.78
$11678
current price $116.78+$9.98 shipping
O-ACE-sis 4 lbs Calcium Hardness Increaser- Pack of 8
Shipping arrives in 3+ days
PureSpa SpaPure Calcium Hardness Increaser 16oz single $14.74
$1474
current price $14.74PureSpa SpaPure Calcium Hardness Increaser 16oz single
33.7 out of 5 Stars. 3 reviews
Free shipping, arrives in 3+ days