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Top 8June 2025

Best Ht Ph/alkalinity Increaser For Hot Tubs

We made a list of the top 8 Ht Ph/alkalinity Increaser For Hot Tubs based on verified reviews, popularity and other factors which we summarized for you in this list.

Best Choice

HTH Spa 86133 pH Up, Spa & Hot Tub Chemical Raises pH, Prevents Corrosion, 2 lbs

HTH Spa 86133 pH Up, Spa & Hot Tub Chemical Raises pH, Prevents Corrosion, 2 lbs

✓BENEFIT: Increases and balances the pH levels in your spa or hot tub water for beautiful clarity, improved sanitizer efficiency and a more relaxing experience
✓IMPROVES PERFORMANCE: Allows sanitizer to work more effectively; Prevents corrosion of spa surfaces and equipment
✓CONTAINS MINERAL CRYSTALS: HTH Spa pH Up is formulated to provide a more relaxing spa experience
✓COMPATIBLE WITH ALL SPAS: HTH Spa pH Up is great for all spas, including bromine, chlorine and biguanide
✓YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Spa Test Strips twice a week to test, balance and maintain total pH levels between 7.2 and 7.8 ppm

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29% Discount

SpaGuard Balance pH Increaser for Spas & Hot Tubs, 18 oz (1.12 lbs/510 g)

SpaGuard Balance pH Increaser for Spas & Hot Tubs, 18 oz (1.12 lbs/510 g)

✓Protects corrosion of equipment due to low pH
✓Balances water for bather comfort
✓Protects your spa or hot tub from corrosion due to low pH
✓SpaGuard pH Increaser is a dry, granular product that gradually raises your pH level

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MAV AquaDoc Calcium Hardness Increaser Hot Tub Owners Rely On, Calcium Booster for Hot Tubs & Spas

MAV AquaDoc Calcium Hardness Increaser Hot Tub Owners Rely On, Calcium Booster for Hot Tubs & Spas

✓Make balancing your water easier & more cost effective with AquaDoc's calcium hardness increaser. Our spa calcium hardness increaser is vital to ensuring proper water hardness levels in your hot tub. AquaDoc's Calcium Booster gets your hardness up.
✓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. Guard calcium levels from decreasing too low with our spa Calcium booster for hot tubs.
✓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. Our spa hardness increaser easily works to raise your Calcium levels by 10ppm increments or more.
✓The Hardness Increaser Hot Tub Owners Love - When it comes to Spa Chemicals calcium hardness increaser is a must have. Without hot tub chemicals calcium hardness can become unbalanced. Always have a hot tub calcium booster ready and waiting.
✓Easy to Use, Made in the USA - (1) Check your calcium levels, (2) 1 ounce of AquaDoc's Calcium increaser will boost water's hardness level by 10ppm. (3) After determining hardness level goal, add proper amount of increaser while equipment is on. (4) Run filter for 1 - 2 hours, wait 20 minutes, then retest water.

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38% Discount

HTH Spa 86131 Alkalinity up, Spa & Hot Tub Chemical Raises Alkalinity, Stabilizes pH Fluctuation, 1.25 lbs

HTH Spa 86131 Alkalinity up, Spa & Hot Tub Chemical Raises Alkalinity, Stabilizes pH Fluctuation, 1.25 lbs

✓BENEFIT: Easily raise the total alkalinity levels in your spa water to ensure it remains clear, clean, and healthy
✓CREATES MORE COMFORTABLE WATER: Keeps the pH levels in range, which helps protect against skin and eye irritation
✓PROLONGS THE LIFE OF YOUR SPA: Helps prevent damage to spa surfaces and equipment (pumps, filters, and heaters)
✓COMPATIBLE WITH ALL SANITIZERS: HTH Spa Alkalinity Up works great with bromine, chlorine and biguanide systems
✓YOU'RE ALL CLEAR WITH HTH: For best results, use HTH Spa Test Strips twice a week to test, balance and maintain total alkalinity levels between 80 and 120 ppm

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17% Discount

AquaDoc Total Alkalinity Increaser for Hot Tub - Alkalinity Booster for Spas & Fresh Water pH Balance

AquaDoc Total Alkalinity Increaser for Hot Tub - Alkalinity Booster for Spas & Fresh Water pH Balance

✓Need to increase Alkalinity Levels? Use our 2 lbs. container of total Spa Alkalinity Increaser! The alkalinity level of your spa is essential to water balance. A balance in the pH helps prevent damage & corrosion.
✓Raise Alkalinity in Spa: With AquaDoc Alkalinity Booster, balancing your spa water is quick and easy. Whenever the ph levels of your water become unstable, add our product to raise it to the optimal range, with our hot tub alkalinity increaser.
✓Alkalinity Up You Can Rely On: Using Alkalinity Booster helps you safeguard your Hot tubs and Spas. It might prevent corrosion and etching on metal and plaster. It helps in reducing skin and eye irritation due to chemical imbalance levels.
✓Spa Alkalinity Boost You Need: Our Alkaline booster helps manage spa ph fluctuations. A clean spa and hot tub with balanced pH levels are all you need for a safe and fun family time. Get your Spa Alkalinity up to help get proper water balance.
✓Hot Tub Alkalinity Increaser from the USA - Choosing AquaDoc means choosing consistent quality. We stand by our quality. We do the hard work so that you can use our Alkaline chemical and see the AquaDoc magic happen.

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SpaChoice 2-Pounds Premium Alkalinity Up, Alkalinity Increaser for Hot Tub, 100% Sodium Bicarbonate, Made in USA

SpaChoice 2-Pounds Premium Alkalinity Up, Alkalinity Increaser for Hot Tub, 100% Sodium Bicarbonate, Made in USA

✓The desired range for total alkalinity is 80-140 ppm
✓Add 1 ounce of this product and retest every 30 minutes until total alkalinity is in the range of 80-140 ppm
✓Raises total alkalinity and prevents pH bounce

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22% Discount

AquaDoc pH Increaser for Hot Tub - pH Up for Hot Tub Spa - pH Increaser Hot Tub Chemicals - Balance Your pH Up and Down Levels Effectively - Adjust pH Levels for Hot Tub Maintenance - 32oz

AquaDoc pH Increaser for Hot Tub - pH Up for Hot Tub Spa - pH Increaser Hot Tub Chemicals - Balance Your pH Up and Down Levels Effectively - Adjust pH Levels for Hot Tub Maintenance - 32oz

✓Why Hot Tub pH Increaser? Did you know that the water in your spa should be maintained at a pH of 7.2 to 7.8 and total alkalinity from 80 to 140 ppm? Using a pH up for hot tub spa will help you maintain your hot tub chemistry effectively.
✓pH Up For Hot Tub Spa - Our pH increaser for hot tub will help you maintain your hot tub chemistry balance. If your spa's pH measure is below its range, it is essential to use a hot tub pH booster to treat cloudy tub, scale build-up, and more.
✓Spa pH Increaser For Hot Tub - When your hot tub pH is not at an ideal level, it indicates that your hot tub water is too acidic, and your sanitizer will be less effective. Using a pH increaser will also help you raise the total alkalinity level.
✓Adjust pH Levels - Incorrect pH levels can impact the water quality, imbalance other chemicals, and cause the water to give itchy skin and eyes. Our pH up also acts as an alkalinity increaser for your hot tub by balancing the total alakalinity.
✓pH Increaser For Hot Tub Made In The USA - At AquaDoc, we make high-quality spa chemicals to help balance your hot tub and spa chemistry and treat them with care. When you choose AquaDoc, you are getting consistent quality.

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HTS Turbo pH Up pH Increaser for Hot Tubs and Spas (2 lb)

HTS Turbo pH Up pH Increaser for Hot Tubs and Spas (2 lb)

✓HTS Turbo pH Up is a reliable pH increaser specifically formulated for hot tubs and spas, ensuring optimal water balance.
✓Maintain the ideal pH levels in your hot tub or spa with our pH Up solution, designed to raise pH effectively.
✓Available in a 2 lb bottle, this spa up for hot tubs provides an ample supply for regular use and easy storage.
✓Our pH increaser, a must-have for maintaining the proper pH levels.
✓HTS Turbo hot tub pH Up is part of our family of balancers that provide a hassle-free solution for increasing and managing the pH levels in your hot tub or spa.

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