Hardness Increaser

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Calcium Hardness Increaser 25 Lb Bucket P37025DE $34.99 Time Remaining: 27d 6h 51m Buy It Now for only: $34.99 Buy It Now | Add to watch list

SWIMMING POOL CALCIUM HARDNESS INCREASE CALCIUM CHLORID $12.00 Time Remaining: 20d 9h 27m Buy It Now for only: $12.00 Buy It Now | Add to watch list

Calcium Hardness Increaser 4 Lb Jar P37004DE $9.99 Time Remaining: 24d 6h 51m Buy It Now for only: $9.99 Buy It Now | Add to watch list

Hot Tub Spa Total Water Balance pH Chemicals Kit $16.95 Time Remaining: 19d 9h 45m Buy It Now for only: $16.95 Buy It Now | Add to watch list

SWIMMING POOL HARDNESS INCREASE CALCIUM CHLORIDE $12.00 Time Remaining: 18d 13h 15m Buy It Now for only: $12.00 Buy It Now | Add to watch list

Swimming Pool Chemical Calcium Hardness Increaser 45 lb $63.99 Time Remaining: 5d 8h 55m Buy It Now for only: $63.99 Buy It Now | Add to watch list

Leisure Time Spa Calcium Booster 1qt $6.02 Time Remaining: 13d 10h 35m Buy It Now for only: $6.02 Buy It Now | Add to watch list

Rx Clear Swimming Pool Spa Calcium Increaser 50 lbs $59.98 Time Remaining: 10d 13h 40m Buy It Now for only: $59.98 Buy It Now | Add to watch list

Calcium Hardness Increaser 50 Lbs P37050DE $67.99 Time Remaining: 25d 6h 34m Buy It Now for only: $67.99 Buy It Now | Add to watch list

10 Spa Hut Tub Chemicals BioGuard $22.00 Time Remaining: 8d 16h 6m Buy It Now for only: $22.00 Buy It Now | Add to watch list

In The Swim Granular Calcium Hardness Increaser For Swimming Pools 45 lbs $64.00 Time Remaining: 19d 11h 39m Buy It Now for only: $64.00 Buy It Now | Add to watch list

LESLIES HARDNESS PLUS ADJUSTER TO RAISE CALCIUM HARDNESS LEVELS IN POOL WATER $11.00 Time Remaining: 21d 12h 53m Buy It Now for only: $11.00 Buy It Now | Add to watch list

In The Swim Granular Calcium Hardness Increaser For Swimming Pools 90 lbs $123.00 Time Remaining: 19d 11h 39m Buy It Now for only: $123.00 Buy It Now | Add to watch list

United Chemical Caltreat Calcium Hardness Reducer Pool Chemical 2 x 25 5 lbs $59.95 Time Remaining: 21d 11h 14m Buy It Now for only: $59.95 Buy It Now | Add to watch list

Rx Clear Swimming Pool Spa Calcium Increaser 25 lbs $34.99 Time Remaining: 10d 13h 38m Buy It Now for only: $34.99 Buy It Now | Add to watch list

Calcium Hardness Increaser 10 Lb Jar P37010DE $16.99 Time Remaining: 27d 6h 51m Buy It Now for only: $16.99 Buy It Now | Add to watch list

SpaGuard Spa Calcium Hardness Increaser 14 OZ Bottle $9.92 Time Remaining: 1d 14h 7m Buy It Now for only: $9.92 Buy It Now | Add to watch list

SPAGUARD BALANCER CALCIUM HARDNESS INCREASER 14oz $5.99 Time Remaining: 6d 9h 8m Buy It Now for only: $5.99 Buy It Now | Add to watch list

Swimming Pool Algaecide Save Chlorine Tablets Shock $4.85 Time Remaining: 12d 15h 32m Buy It Now for only: $4.85 Buy It Now | Add to watch list

3 pack Leisure Time Spa Calcium Booster 1qt $18.06 Time Remaining: 1d 16h 46m Buy It Now for only: $18.06 Buy It Now | Add to watch list

2 Quarts Leisure Time Spa and Hot Tub pH Balance Locks in the pH Fast Shipping $25.99 Time Remaining: 19d 16h 59m Buy It Now for only: $25.99 Buy It Now | Add to watch list

SWIMMING POOL HARDNESS INCREASE CALCIUM CHLORIDE $12.00 Time Remaining: 20d 9h 27m Buy It Now for only: $12.00 Buy It Now | Add to watch list

Swimming Pool Calcium Increaser Up Plus 10 Lb P37010DE $24.95 Time Remaining: 22d 6h 33m Buy It Now for only: $24.95 Buy It Now | Add to watch list

Stabilizer 7 lb pail NY569 $29.99 Time Remaining: 9d 13h 28m Buy It Now for only: $29.99 Buy It Now | Add to watch list

Fast Acting Long Lasting Swimming Pool Algaecide Save Chlorine Tablets Shock $29.85 Time Remaining: 12d 15h 16m Buy It Now for only: $29.85 Buy It Now | Add to watch list

GLB Rendezvous Liquid Calcium Hardness Up 1qt $5.31 Time Remaining: 22d 17h 58m Buy It Now for only: $5.31 Buy It Now | Add to watch list

In The Swim Granular Calcium Hardness Increaser For Swimming Pools 4 lbs $20.00 Time Remaining: 19d 11h 39m Buy It Now for only: $20.00 Buy It Now | Add to watch list

Swimming Pool Chemicals Calcium Hardness Increaser 4 lb $19.99 Time Remaining: 5d 8h 55m Buy It Now for only: $19.99 Buy It Now | Add to watch list

BioGuard Balance Pak 300 Calcium Hardness Increaser 5 lb Container $18.99 Time Remaining: 8d 9h 26m Buy It Now for only: $18.99 Buy It Now | Add to watch list

BaquaSpa Calcium Hardness Increaser $4.48 Time Remaining: 12d 14h 32m Buy It Now for only: $4.48 Buy It Now | Add to watch list

In The Swim Granular Calcium Hardness Increaser For Swimming Pools 25 lbs $48.00 Time Remaining: 19d 11h 39m Buy It Now for only: $48.00 Buy It Now | Add to watch list

CALCIUM HARDNESS INCREASER 5lb container $8.00 Time Remaining: 15d 14h 23m Buy It Now for only: $8.00 Buy It Now | Add to watch list

Natural Chemistry Calcium Hardness Increaser 175 lbs $5.21 Time Remaining: 28d 12h 1m Buy It Now for only: $5.21 Buy It Now | Add to watch list

84367 BAQUACIL HARDNESS INCREASER 35 LB $6.95 Time Remaining: 13d 13h 53m Buy It Now for only: $6.95 Buy It Now | Add to watch list

Swimming Pool Chemical Calcium Hardness Increaser 25 lb $47.99 Time Remaining: 5d 8h 55m Buy It Now for only: $47.99 Buy It Now | Add to watch list

pH Increaser 25 lb pail NY485 $39.99 Time Remaining: 9d 13h 28m Buy It Now for only: $39.99 Buy It Now | Add to watch list

Hardness Increaser 25 lb pail NY598 $54.99 Time Remaining: 22d 11h 53m Buy It Now for only: $54.99 Buy It Now | Add to watch list

E Z EZ Spa Cal Fast Dissolving Granular Calcium Hardness Increaser 1 lb Hot Tub $6.95 Time Remaining: 5h 9m Buy It Now for only: $6.95 Buy It Now | Add to watch list

ProTeam Spa Calcium Up 1 lbs $3.11 Time Remaining: 14d 21h 24m Buy It Now for only: $3.11 Buy It Now | Add to watch list

Calcium Hardness Increaser Spas Hot Tub Chemicals SpaGuard $10.98 Time Remaining: 23d 8h 11m Buy It Now for only: $10.98 Buy It Now | Add to watch list

Swimming Pool algaecide Save Chlorine tablets shock $23.85 Time Remaining: 29d 20h 59m Buy It Now for only: $23.85 Buy It Now | Add to watch list

GLB CALCIUM HARDNESS UP 15LB 71212 $24.99 Time Remaining: 8d 14h 35m Buy It Now for only: $24.99 Buy It Now | Add to watch list

Swimming Pool Chemical Kit Full Season 30000 Gal Summer $294.95 Time Remaining: 16d 9h 54m Buy It Now for only: $294.95 Buy It Now | Add to watch list

SPA Essentials Start Up Maintenance Kit GREAT DEAL $45.00 Time Remaining: 14d 8h 42m Buy It Now for only: $45.00 Buy It Now | Add to watch list

Rx Clear Swimming Pool Spa Calcium Increaser 4 lbs $18.99 Time Remaining: 10d 13h 38m Buy It Now for only: $18.99 Buy It Now | Add to watch list

Natural Chemistry Calcium Hardness Increaser 175 lbs $22.99 Time Remaining: 10d 6h 47m Buy It Now for only: $22.99 Buy It Now | Add to watch list

Spa Clear Hardness Increaser 12 pack 14 oz bottles For Spas Hottubs jacuzzi $39.99 Time Remaining: 17d 10h 27m Buy It Now for only: $39.99 Buy It Now | Add to watch list

Lo Chlor Swimming Pool Salt Cell Protector Plus 1 gal $33.99 Time Remaining: 10d 13h 37m Buy It Now for only: $33.99 Buy It Now | Add to watch list

Lot of 2 DuPONT Calcium Hardness Increaser 1QT each bottle $16.00 Time Remaining: 5d 11h 37m Buy It Now for only: $16.00 Buy It Now | Add to watch list

E Z EZ Spa Cal Calcium Hardness Increaser 1 lb $7.69 Time Remaining: 12d 18h 17m Buy It Now for only: $7.69 Buy It Now | Add to watch list

Spa Calcium Hardness Increaser 1 lb jar NP113 $14.99 Time Remaining: 13h 14m Buy It Now for only: $14.99 Buy It Now | Add to watch list

Hot Tub Spa 7Pc Chemical Kit Includes Oxy ShockChlorineBalancers Test Kit $84.99 Time Remaining: 2d 12h 46m Buy It Now for only: $84.99 Buy It Now | Add to watch list

Hot Tub Spa 13pc Chemical Kit With Oxy Shock Bromine Balancers Test Kit $79.99 Time Remaining: 19d 11h 4m Buy It Now for only: $79.99 Buy It Now | Add to watch list

Full Season Pool Chemical Kit All Sizes Pools Kits $344.99 Time Remaining: 20d 10h 56m Buy It Now for only: $344.99 Buy It Now | Add to watch list

Amerse Calcium Hardness Incr 16 oz Softub $4.31 Time Remaining: 21d 18h 47m Buy It Now for only: $4.31 Buy It Now | Add to watch list

SWIMMING POOL CALCIUM HARDNESS INCREASER chemical 4 LB $8.99 Time Remaining: 26d 9h 19m Buy It Now for only: $8.99 Buy It Now | Add to watch list

Spa Essentials Calcium Hardness Increaser 14 oz $4.49 Time Remaining: 26d 11h 13m Buy It Now for only: $4.49 Buy It Now | Add to watch list

Baqua Spa Calcium Hardness Increaser 14 oz $3.99 Time Remaining: 10d 6h 48m Buy It Now for only: $3.99 Buy It Now | Add to watch list

Spa Hot Tub Chemicals Calcium water hardness increaser $8.99 Time Remaining: 20d 6h 19m Buy It Now for only: $8.99 Buy It Now | Add to watch list

Natural Chemistry Spa Calcium Hardness Increaser 175lb $17.00 Time Remaining: 24d 12h 12m Buy It Now for only: $17.00 Buy It Now | Add to watch list

United Chemical Easy Alkalinity Total Increaser Pool Chemical 24 PACK 24 lbs $59.49 Time Remaining: 21d 16h 3m Buy It Now for only: $59.49 Buy It Now | Add to watch list

14 oz SPA ESSENTIALS CALCIUM HARDNESS INCREASER HOT TUB $5.00 Time Remaining: 5d 8h 33m Buy It Now for only: $5.00 Buy It Now | Add to watch list

Swimming Pool algaecide Save Chlorine tablets shock $4.85 Time Remaining: 6d 20h 59m Buy It Now for only: $4.85 Buy It Now | Add to watch list

Swimming Pool Chemical Kit Full Season 15000 Gal Summer $184.95 Time Remaining: 16d 9h 53m Buy It Now for only: $184.95 Buy It Now | Add to watch list

Spa Essentials pH Decreaser 22 oz $3.99 Time Remaining: 26d 10h 27m Buy It Now for only: $3.99 Buy It Now | Add to watch list

Natural Chemistry CALCIUM HARDNESS UP 175 lbs 04105 $9.99 Time Remaining: 5d 7h 17m Buy It Now for only: $9.99 Buy It Now | Add to watch list

Spa Essentials Alkalinity Increaser 1 lb $5.99 Time Remaining: 26d 11h Buy It Now for only: $5.99 Buy It Now | Add to watch list

United Chemical Caltreat Calcium Hardness Reducer CPT C12 Pool Chemical 25 lbs $34.99 Time Remaining: 21d 11h 5m Buy It Now for only: $34.99 Buy It Now | Add to watch list

pH Increaser 5 lb pail NY475 $17.99 Time Remaining: 9d 13h 28m Buy It Now for only: $17.99 Buy It Now | Add to watch list

Spa Solutions Calcium Up 1 Lb Jar P37001DE $10.99 Time Remaining: 3d 5h 27m Buy It Now for only: $10.99 Buy It Now | Add to watch list

Stabilizer 2 lb jar NY560 $19.99 Time Remaining: 9d 13h 28m Buy It Now for only: $19.99 Buy It Now | Add to watch list

Swim Time 8 lbs Hardness Increaser NY595 $20.95 Time Remaining: 10d 15h 31m Buy It Now for only: $20.95 Buy It Now | Add to watch list

Swimming Pool Calcium Increaser Up Plus 4 Lb P37004DE $18.95 Time Remaining: 21d 7h 17m Buy It Now for only: $18.95 Buy It Now | Add to watch list

Spa Solutions 1 lb Calcium Booster P37001DE $3.33 Time Remaining: 10d 14h 59m Buy It Now for only: $3.33 Buy It Now | Add to watch list

SPA START UP KIT STD CHLORINE ALL IN ONE CHEMICAL $51.17 Time Remaining: 10d 5h 6m Buy It Now for only: $51.17 Buy It Now | Add to watch list

More Great Information on Hardness Increaser:

pool water analysis are these chemicals necessary?

Here are my test results:
Free Chlorine
3.1 ppm
1.0 - 3.0 ppm
Total Chlorine
3.4 ppm
1.0 - 3.0 ppm
Combined Chlorine
0.3 ppm
0.0 - 0.2 ppm
pH
7.6
7.2 - 7.6
Hardness
65 ppm
175 - 275 ppm
Alkalinity (w/ stabilizer correction)
31 ppm
100 - 150 ppm
Cyanuric Acid
19 ppm
30 - 100 ppm
Copper
0 ppm
0 - 0 ppm
Iron
0 ppm
0.0 - 0.0 ppm
TDS 500ppm 0-2000ppm

Your alkalinity and hardness are low . This is what produces a buffer solution in Your Pool which resists big swings in pH. So yes, you need Alkalinity Increaser and calcium. Your chlorine looks ok at the moment, but it has a short life in the pool.

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