SpaGuard® Total Alkalinity Increaser for Spas & Hot Tubs, 2 lb 42630BIO
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Key Features & Benefits
Prevents pH Bounce
Raises total alkalinity so pH stays steady between tests
Simple Dosing
Engineered for seamless compatibility with original mounting points for secure placement.1 tbsp per 100 gallons raises alkalinity 25 ppm (per SpaGuard®)
100% Sodium Bicarbonate
Single active ingredient listed on the label
2 lb Bottle
907 g of granules in a resealable bottle
Genuine SpaGuard®
Manufactured for BioLab, Inc., part number 42630BIO
Balance Alkalinity First
Correct alkalinity before fine-tuning pH for longer-lasting results
Product Overview
SpaGuard® Total Alkalinity Increaser raises the total alkalinity of spa and hot tub water. Total alkalinity buffers pH, so when it runs low, pH swings up and down with every chemical addition, a problem known as "pH bounce." The label states it raises total alkalinity and prevents pH bounce. The active ingredient is 100% sodium hydrogen carbonate (sodium bicarbonate), and the bottle holds 2 lb (907 g) of granules.
Test total alkalinity first. SpaGuard® states that 1 tablespoon per 100 gallons raises total alkalinity by 25 ppm, so you can work out the dose from your spa's capacity and the increase you need. Broadcast the measured amount over the water with the pump running, circulate for 30 minutes, then retest before adjusting pH. Use the alkalinity range your spa manufacturer recommends.
The label carries the CAUTION signal word: may cause eye irritation. Keep it out of reach of children and do not mix it with other chemicals. It is a water balancer and does not sanitize the spa. If you prefer pre-measured tablets, SpaGuard® also makes Rapid-Dissolve Alkalinity Increaser Tabs.
Frequently Asked Questions
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It raises total alkalinity in spa and hot tub water, which buffers pH and helps prevent pH bounce.
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SpaGuard® states 1 tablespoon per 100 gallons raises total alkalinity by 25 ppm. Test first and add in steps.
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Broadcast the measured amount over the water with the pump running. Circulate for 30 minutes, then retest.
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When alkalinity is too low, pH swings up and down with each chemical addition and is hard to keep in range.
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Alkalinity first. Once it is in range, fine-tune pH with a pH increaser or decreaser.
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Use the range your spa manufacturer recommends, and test with a kit or strip that reads total alkalinity.
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It can raise pH slightly. Retest pH after alkalinity is in range and adjust if needed.
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Sodium hydrogen carbonate (sodium bicarbonate), 100%, per the label.
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The label carries the CAUTION signal word: may cause eye irritation. Keep out of reach of children.
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No. It is a water balancer. Keep using your normal sanitizer.
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