When total alkalinity is too low, pool water becomes difficult to control. pH swings wildly, chlorine efficiency drops, surfaces become vulnerable to etching, and swimmers often notice irritation. GLB Alkalinity Up 10 lb is a professional-grade pool water balancer designed to raise total alkalinity quickly and predictably, creating the stable foundation every properly maintained pool needs.

Alkalinity acts as a buffer for pH. Without it, even small chemical additions or environmental changes can throw water balance off. GLB Alkalinity Up restores that buffer, making water easier to manage, safer for equipment, and more comfortable for swimmers.

This product is ideal for both routine water balancing and corrective treatment when alkalinity levels fall below recommended ranges.

Why Total Alkalinity Is the Foundation of Water Balance

Many pool problems blamed on “bad pH” or “weak chlorine” actually start with low alkalinity. When alkalinity is out of range, pH becomes unstable, forcing constant adjustments and excessive chemical use.

Low alkalinity can lead to:

• Rapid pH fluctuations

• Reduced chlorine effectiveness

• Corrosive water that damages plaster, metal, and heaters

• Eye and skin irritation

• Increased chemical demand

By correcting alkalinity first, GLB Alkalinity Up helps stabilize the entire water chemistry system instead of chasing symptoms.

How GLB Alkalinity Up Works

GLB Alkalinity Up uses a high-purity alkalinity increaser that dissolves cleanly and raises total alkalinity without introducing unwanted byproducts. Once alkalinity is restored to the recommended range, pH becomes easier to maintain and chlorine performs more efficiently.

Because alkalinity changes should be controlled and measured, this product is formulated for predictable dosing and consistent results—important for both homeowners and service professionals.

When to Use GLB Alkalinity Up

GLB Alkalinity Up is appropriate whenever test results show total alkalinity below the recommended range (typically 80–120 ppm for most pools, depending on system type).

Common Use Situations

• New pool startups

• After heavy rainfall or dilution from fresh fill water

• Pools with chronic pH instability

• After acid treatments or stain removal

• Seasonal openings and corrective balancing

Raising alkalinity first often reduces the amount of additional chemicals needed later.

Supports Efficient Chlorine Performance

Chlorine works best when water chemistry is stable. Low alkalinity causes pH to drift rapidly, which reduces chlorine’s sanitizing power and increases chlorine consumption.

By stabilizing alkalinity, GLB Alkalinity Up helps:

• Improve chlorine efficiency

• Reduce sanitizer waste

• Maintain more consistent free chlorine readings

• Lower overall chemical usage

This makes it a foundational product in any balanced water-care program.

Safe for All Pool Types

GLB Alkalinity Up is compatible with:

• Chlorine pools

• Saltwater pools

• Plaster, vinyl, fiberglass, and tile finishes

• Standard filtration and circulation systems

When used as directed, it will not cloud water or harm pool surfaces.

Product Information

Buy with Confidence from Benchmark Pool Supply

When you purchase GLB Alkalinity Up 10 lb from Benchmark Pool Supply, you’re choosing a professional-grade balancing chemical trusted by pool technicians who understand that stable water starts with proper alkalinity.

We recommend correcting alkalinity before chasing pH or chlorine issues, because it saves time, reduces chemical waste, and protects pool surfaces and equipment long-term. This product is stocked because it delivers consistent, predictable results—exactly what proper pool care requires.