Home

Explore

View Cart

Deals

Saved

Suggested searches

Plant-based protein powders
Vegan leather handbags
Bedroom decor
Waterproof jackets
Hoodies

Learn more about how we use your data to personalize your experience and ads. Recommendations are for informational purposes only.

hottubheroes

Products

Products

hottubheroes

Alkalinity Increaser

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$9.99

Color

Black

Quantity

Product description loading

Product description loading

This is the product description text that will appear here.

Shopping designed around you.

Start selling

For brands

For creators

Build your store

Information

Shop Pay

Help center

Social

X (Twitter)

Instagram

Legal

Terms of Service

Privacy Policy

Your Privacy Choices

Powered by

|

Start selling for free

Language

© Shopify Inc. 2026

Quantity

1

Description

Concentrated granular formula gradually raises the total alkalinity level and prevents pH bounce in spa water.

Delivery & Returns

Returns accepted within 30 days

Exclusions may apply. See full policy

hottubheroes

You might also like

hottubheroes

pH Up 1lb

hottubheroes

Unique

hottubheroes

Spa Down

hottubheroes

Spa 56 Chlorinating Granules

hottubheroes

Spa Shock Xtra

The Leisure Time Spa pH Balancer, 3 lb bottle (LT28) with a yellow cap helps maintain proper spa water pH levels. Keep out of reach of children.

Pool Goods

Leisure Time pH Balance Plus 3 lb / 52 oz|45410A

SuntekOnline

Leisure Time - Spa Down 2.5 lbs

hottubheroes

Renew Granular

SuntekOnline

Leisure Time - Spa Up 2 lbs

(1)

Swimmingpoolpartsonline.com

Leisure Time Spa Chemicals - Spa Up 2 lb

The Leisure Time Spa pH Up Balancer is a 2 lb bottle designed for easy spa water maintenance, effectively raising pH levels and total alkalinity. It contains sodium bicarbonate and has necessary warning labels.

Pool Goods

Leisure Time Spa Up 2 lb|22339A

(5)

Total Alkalinity Increaser | 1KG Chemicals Wave Spas

15% off

Wave Spas

Alkalinity Increaser | 1KG | ETL

Test Strips Leisure Time Spa

31% off

Shasta Pool Supply

Test Strips Leisure Time Spa | Hot Tub pH, Alkalinity & Hardness

23% off

Aqua Paradise

SpaGuard Alkalinity Increaser

SpaPure Alkalinity Increaser - Yardandpool.com

Yardandpool.com

SpaPure Alkalinity Increaser - 1 lb

(1)

hottubheroes

Nature2 Mineral Purifier Cartridge

Leisure Time Spa Down 2.5lbs.

National Discount Pool Supplies, LLC

Leisure Time Spa Down 2.5 lbs.

hottubheroes

pH Down 1.5lb

hottubheroes

Filter Cleaner

Leisure TIme Spa Up Water Balancer for Hot Tubs

National Discount Pool Supplies, LLC

Leisure Time Spa Up 2 lbs.

My Pool Hut

Leisure Time Spa Up

Hot Tub SERUM Turbo pH Up - 2 lb. - Leisure Time Inc.

Exclusive offer available

Leisure Time Inc.

Hot Tub Serum Turbo pH Up | Spa pH Increaser

hottubheroes

Natural Clear Enzyme Cleaner (16oz) NLA...see "Unique"

Hot Tubs, Inc.

Leisure Time Instant Cartridge Clean 16oz

Hot Tubs, Inc.

Alkalinity Up, 16oz

(1)

The curated dining table

The curated dining table

Dinnerware, glasses, and flatware.

My Pool Hut

Leisure Time Spa Down

Bright & Clear Leisure Time

11% off

Shasta Pool Supply

Bright & Clear Leisure Time | Clarifier Cloudy Spa Water

The 32 oz Leisure Time Spa Bright & Clear Clarifier, in a tall white bottle with a purple cap, highlights its water clarity advantages and includes safety warnings.

Pool Goods

Leisure Time Bright & Clear 1 qt / 32 oz|A

(1)

pH Balance Plus Leisure Time Spa

10% off

Shasta Pool Supply

pH Balance Plus Leisure Time Spa | Eliminate Low/High Hot Tub PH

English cottage touches

English cottage touches

Collected classics with country-house charm

SpaPure Alkalinity Increaser 1 lb – Spa Chemical for pH Balance and Water Care

Pools Plus More

SpaPure Alkanity Increaser (1 lb)

hottubheroes

Defoamer 16 oz.

hottubheroes

Jet Clean (16oz)

National Discount Pool Supplies, LLC

Leisure Time Bright & Clear Spa Clarifier 32 oz.

hottubheroes

Foam Out (32oz) NLA...see "Unique"

Leisure Time Spa Down product bottle on a white background

Masterspapartsonline

Leisure Time - Spa Down 2.5 lbs

hottubheroes

Sodium Bromide (1lb)

Pools Plus More

Leisure Time Spa Up 2 lb

Leisure Time Spa Renew Non-Chlorine Shock, 2.2 lb Bottle | RENU2

Ever-Klear Pool Supply

Spa Chemical | Leisure Time | Spa Renew Non-Chlorine Shock 2.2 lb | Fast-Acting | 1 Bottle

Leisure Time Spa Up product on a white background

Masterspapartsonline

Leisure Time - Spa Up 2 lbs

Hot Tub Warehouse

Spa Pure Alkalinity Increaser 2 lb

(36)

A bottle of Leisure Time Enzyme pool and spa water clarifier.

Mainely Tubs

Leisure Time, Enzyme 32 oz 785336302515

Bottle of Leisure Time Metal Gon. 16 ounces, grey bottle with blue cap.

5% off

The Spa and Sauna Company

Leisure Time Metal Gon

(1)

Swimmingpoolpartsonline.com

Leisure Time Spa Chemicals - Spa Down 2.5 lb

hottubheroes

Filter Cleaner

2 lbs. Of WATER TRENDS Spa Alkalinity Up - WaterTrendsStore - 597

42% off

WaterTrendsStore

2 lbs. Of WATER TRENDS Spa Alkalinity Up

hottubheroes

Alkalinity Increaser

hottubheroes

Spa Test Strips

A bottle of Leisure Time Spa Up 2 Lb spa care product in a gray bottle with an orange lid.

Mainely Tubs

Leisure Time, Spa Up 2 Lb

Bar cart basics

Bar cart basics

Carts, glassware, and bottle storage.

27% off

LeisureConcepts

Alka Rise, Alkalinity increaser, 1.5 pound jar

hottubheroes

Spa Clarifier (16oz) NLA...see "Unique"

New England Spas

Leisure Time Renew Non-Chlorine Shock Oxidizer - Crystal Clear Spa Water Treatment

2 lbs. Of WATER TRENDS Spa Alkalinity Up - The Great Escape

42% off

The Great Escape

2 lbs. Of WATER TRENDS Spa Alkalinity Up

(4)

Alkalinity & pH Up

SpaDepot.com

Alkalinity & pH Up

(26)

New England Spas

Leisure Time Spa Down (2.5 lb. container)

Leisure Time Spa Up pH increaser bottle, 2 lb

35% off

ePoolSupply

Leisure Time Spa Up | pH Increaser for Spas | 22339A

St. Cyr Pool & Spa

Spa Pure Alkalinity Increaser 1Lb

Leisure Time Calcium Booster | CB Leisure Time

Pool Goods

Leisure Time Calcium Booster | CB

hottubheroes

Oxidizer Shock - Non-Chlorine

Pool Solutions LLC

Spa Pure Alkalinity Increaser

hottubheroes

Spa Algaecide

hottubheroes

AquaChek Spa 6-in-1 Test Strips-50

Pool and Spa Sale

Leisure Time Metal Gon

(5)

A 32 oz bottle of Leisure Time Spa Defender by Leisure Time, featuring a purple cap and pink label, is designed for effective scale prevention in spas and hot tubs.

10% off

Pool Goods

Leisure Time Defender 1 qt / 32 oz|B

(2)

Yardandpool.com

Leisure Time Spa Chemicals - Spa Down 2.5 lb

(2)

hottubheroes

Broma Start (2oz)

Leisure Time Renew Granular 5 lb Pail, 6/Case| LT40

Ever-Klear Pool Supply

Pool Chemical | Leisure Time | LT40 | 5 Lb Granular | Ultra Strength

A container of Leisure Time Bromine Tablets with a red cap.

Mainely Tubs

Bromine Tablets 2.2lb

Leisure Time Bromine Tabs 1.5 lbs.

Hot Tub Spa Source

Leisure Time Bromine Tabs 2.2 lbs.

(1)

Hot Tub Warehouse

Natural Chemistry Spa Alkalinity Increaser - 2.71 Pounds

(1)

National Discount Pool Supplies, LLC

Leisure Time pH Balance Plus 3lbs

Leisure Time Powdered pH Up 2 lb.

Hot Tub Spa Source

Leisure Time Powdered pH Up 2 lb.

(1)

Leisure Time Spa Renew Non - Chlorine Shock, 2.2 lb Bottle | RENU2 - Chemical - img - 1

30% off

Aqua Pool Supply

Leisure Time Spa Renew Non-Chlorine Shock, 2.2 lb Bottle | RENU2

hottubheroes

Granular Chlorine

hottubheroes

Stain & Scale Preventer

hottubheroes

Filter Clean

hottubheroes

Clarifier 16 oz.

Gray bottle of renew by Leisure time with a red cap.

Mainely Tubs

Leisure Time, Renew Shock 2.2 Lb

Leisure Time Spa Chemicals - Spa Mineral Purifier - Yardandpool.com

Yardandpool.com

Leisure Time Spa Chemicals - Spa Mineral Purifier

(1)

hottubheroes

Chlorinating Concentrate (Granular)

1 lb. calcium booster for spas

National Discount Pool Supplies, LLC

Leisure Time Calcium Booster 1 lb.

New England Spas

Leisure Time Spa Up (2 lb. container)

All Spa Superstore

Spacare Alk & pH Increaser 500g

Yardandpool.com

Leisure Time Spa Chemicals - Spa Up 2 lb

(5)

Spa 56 Pool Spa Cleaning Chlorinating Sanitizing Granules 5 Pounds

SpaChemGuy

Chlorinating Sanitizing Granules 5 Pounds

Hot Tub Warehouse

Spa Pure Alkalinity Increaser 1 lb

(3)

MasterSpasUSA

Alkalinity Up

SuntekOnline

Leisure Time - Calcium Booster 1 lb