Maintaining balanced pool chemistry is crucial for a clean, safe, and enjoyable swimming experience. The In The Swim Alkalinity Up, a 50 lb bag of Solvay Bicar Sodium Bicarbonate, stands out as an essential product for any pool owner looking to stabilize their water’s pH levels effectively.

This powerful additive helps prevent rapid pH fluctuations, often referred to as ‘pH bounce,’ which can lead to various problems like skin irritation, cloudy water, and damage to pool equipment. Understanding its role is key to comprehensive pool care and extending the life of your pool infrastructure.
Quick Product Summary
- Rating: 4.7 out of 5 stars (958 reviews)
- Price: $56.99
- Key Pros:
- Highly effective at raising total alkalinity and stabilizing pH.
- Comes in a large, cost-effective 50 lb bulk bag.
- Helps protect pool equipment from corrosion and staining.
- Key Cons:
- Can temporarily cloud water if not properly dissolved.
- The 50 lb bag can be heavy and challenging to handle for some.
Table of Contents
In The Swim Alkalinity Up Overview
Total alkalinity (TA) is a critical component of pool water chemistry, often overlooked but fundamentally important for maintaining a stable and healthy swimming environment. The In The Swim Alkalinity Up is specifically designed to address low total alkalinity levels, which can lead to a host of pool problems.
Essentially, total alkalinity acts as a buffer against fluctuations in pH. Think of it as the pool’s shock absorber for pH. When TA is within the ideal range (typically 80-120 ppm), it helps keep your pH from swinging wildly due to rain, swimmer load, or the addition of other chemicals.
The primary ingredient in In The Swim Alkalinity Up is sodium bicarbonate, which is essentially baking soda in a purer, granular form optimized for pool use. This compound effectively increases the concentration of bicarbonate ions in the water, which are key to its buffering capacity.
Without adequate total alkalinity, your pool’s pH can become extremely unstable. This phenomenon, known as ‘pH bounce,’ can cause the pH to rise and fall dramatically and rapidly. Such instability can quickly degrade water quality and create uncomfortable swimming conditions.
Low total alkalinity can also lead to corrosion of metal components in your pool, such as heaters, ladders, and pump impellers. It can also cause etching and staining of plaster or grout surfaces, leading to costly repairs over time. Therefore, maintaining proper TA is a preventative measure for your pool’s longevity.
Furthermore, an unstable pH due to low alkalinity can reduce the effectiveness of your chlorine sanitizer. Chlorine works most efficiently within a narrow pH range (7.4-7.6). When pH is constantly fluctuating, your chlorine may not be sanitizing as effectively, potentially leading to algae growth or bacterial issues.
The 50 lb bag offered by In The Swim provides a substantial quantity of alkalinity increaser, making it a cost-effective choice for regular pool maintenance, especially for larger pools or those requiring frequent adjustments. Buying in bulk reduces the per-pound cost and ensures you always have a supply on hand.
Compared to smaller packages, this bulk option minimizes the frequency of reordering and reduces packaging waste over time. This makes the In The Swim Alkalinity Up a practical and economical solution for dedicated pool owners and maintenance professionals.
Proper dosage and application are vital for optimal results. Generally, a measured amount is dissolved in a bucket of water and then slowly dispersed around the pool’s perimeter. This method helps prevent temporary clouding and ensures even distribution of the chemical throughout the water volume.
Regular testing of total alkalinity, along with pH, calcium hardness, and sanitizer levels, is an indispensable part of pool care. Utilizing a reliable test kit or strips allows you to monitor your water chemistry and apply products like In The Swim Alkalinity Up precisely when needed.
Understanding the interplay between these chemical parameters is crucial. While alkalinity up directly impacts TA, it also has a slight effect on pH, typically raising it slightly. This integrated approach to water balance ensures a pristine and safe swimming environment for everyone.
For more detailed information on pool chemistry, you can consult authoritative resources such as the Pool & Hot Tub Alliance, which provides comprehensive guides on maintaining healthy pool water.
In The Swim Alkalinity Up Key Features & Specifications
The In The Swim Alkalinity Up is formulated with high-quality Solvay Bicar sodium bicarbonate, a premium grade of alkalinity increaser. This ensures consistent performance and effective chemical balancing for your swimming pool.
The product comes in a substantial 50-pound bag, which is a significant feature for many pool owners. This bulk packaging offers considerable savings over smaller containers and reduces the frequency of purchases, making it convenient for ongoing maintenance.
Sodium bicarbonate, as a chemical compound, is known for its excellent buffering capabilities. When added to pool water, it dissolves to release bicarbonate ions, which readily neutralize acids, thereby stabilizing the pH and preventing sudden drops or surges.
The purity of the Solvay Bicar used is crucial. High-purity sodium bicarbonate minimizes the introduction of unwanted contaminants into your pool water, which could otherwise lead to problems like cloudiness or staining. This product is designed for clean and effective application.
A key specification is its granular form. This allows for easier handling and dissolution compared to powdered products that might clump. While it can cause temporary cloudiness, proper application techniques, such as pre-dissolving, can mitigate this effect significantly.
The 50 lb bag is robust and designed for storage, though it should always be kept in a cool, dry place away from direct sunlight and moisture. Proper storage ensures the product remains potent and free-flowing for an extended period, maintaining its efficacy for future use.
One of the primary benefits of using a dedicated alkalinity increaser like In The Swim Alkalinity Up is its targeted action. It primarily raises total alkalinity with only a minor, manageable impact on pH, allowing for precise chemical adjustments without overcorrecting other parameters.
This product is compatible with all types of pool surfaces, including vinyl liners, plaster, fiberglass, and pebble finishes. It also works seamlessly with various sanitizing systems, including chlorine, bromine, and saltwater chlorine generators, making it a versatile choice for any pool.
The chemical stability provided by adequate total alkalinity also protects pool equipment. Components like heaters, pumps, and filters are less prone to corrosion or scale buildup when water chemistry, particularly pH and alkalinity, remains balanced. This translates to longer equipment lifespan and fewer repair costs.
From a safety perspective, sodium bicarbonate is a relatively benign chemical, but proper handling is always recommended. Wearing gloves and eye protection, and ensuring good ventilation, are standard practices when working with any pool chemical, including this alkalinity increaser.
The large quantity ensures that even pools with persistent alkalinity issues or those that experience heavy use can be effectively managed. It’s a foundational chemical for maintaining the Langelier Saturation Index (LSI), which predicts water’s corrosive or scale-forming tendencies.
In summary, the In The Swim Alkalinity Up provides a high-quality, cost-effective, and reliable solution for total alkalinity management. Its specific formulation and packaging make it an excellent choice for maintaining optimal pool water chemistry with minimal hassle.
Pros & Cons
Evaluating any pool chemical involves weighing its advantages against potential drawbacks. The In The Swim Alkalinity Up, while an excellent product, is no exception. Understanding these points helps pool owners make informed decisions.
Pros:
- Highly Effective at Raising Total Alkalinity and Stabilizing pH: This is the primary function of sodium bicarbonate, and the In The Swim product excels here. It efficiently buffers pool water, preventing the erratic pH swings that can lead to numerous problems. Consistent TA levels mean a more stable pH, which is ideal for sanitizer efficiency and swimmer comfort.
- Comes in a Large, Cost-Effective 50 lb Bulk Bag: For homeowners with medium to large pools, or those who consistently need to adjust alkalinity, this bulk size offers significant economic benefits. The per-pound cost is considerably lower than smaller packages, saving money over the swimming season. It also reduces the need for frequent reordering and trips to the store.
- Helps Protect Pool Equipment from Corrosion and Staining: Stable water chemistry, particularly balanced total alkalinity and pH, is vital for the longevity of your pool infrastructure. Low alkalinity and fluctuating pH can cause metals to corrode and plaster surfaces to etch or stain. By maintaining proper TA, this product acts as a protective shield for your valuable pool components.
- Enhances Sanitizer Efficiency: When pH is stable and within the optimal range (7.4-7.6), chlorine works at its peak effectiveness. By preventing pH bounce, In The Swim Alkalinity Up ensures that your chlorine can properly sanitize the water, reducing the likelihood of algae and bacterial growth and potentially lowering overall chlorine consumption.
- Easy to Use with Clear Directions: While pool chemistry can seem daunting, adding alkalinity increaser is relatively straightforward. The granular form dissolves well, and with standard testing and following dosage recommendations, even novice pool owners can effectively manage their TA levels.
- Versatile for All Pool Types: This product is safe and effective for use in pools with vinyl, plaster, fiberglass, or pebble finishes, and is compatible with various sanitization methods. This versatility makes it a go-to product for a wide range of pool setups.
Cons:
- Can Temporarily Cloud Water if Not Properly Dissolved: A common characteristic of granular pool chemicals, sodium bicarbonate can cause temporary cloudiness if added too quickly or in too large a quantity directly to the pool. This cloudiness is usually harmless and dissipates as the product dissolves and circulates. However, it can be a minor aesthetic inconvenience.
- The 50 lb Bag Can Be Heavy and Challenging to Handle for Some: While the bulk size is a cost-saving advantage, a 50-pound bag can be cumbersome to lift, transport, and pour for individuals with physical limitations. Proper lifting techniques and potentially using a scoop or smaller container for dispensing are recommended.
- Requires Careful Measurement and Testing: Incorrect dosing can lead to overshooting the target alkalinity, which then requires further adjustments with pH decreasers. Consistent testing and precise measurement are necessary to achieve optimal results and avoid creating new chemical imbalances.
- Does Not Directly Adjust pH (Primarily TA): While it stabilizes pH, In The Swim Alkalinity Up is not a primary pH adjuster like pH increaser (soda ash) or pH decreaser (muriatic acid or dry acid). It raises TA, which in turn buffers pH, but if your pH is already very high or low, you may need a separate pH adjustment first.
Overall, the benefits of using In The Swim Alkalinity Up far outweigh its minor drawbacks. Its effectiveness in maintaining critical water balance makes it an indispensable tool for any serious pool owner, ensuring a healthier and more enjoyable swimming experience.
Who Should Buy the In The Swim Alkalinity Up?
The In The Swim Alkalinity Up is a versatile and essential product for a broad spectrum of pool owners, from novices to seasoned professionals. Its specific benefits cater to various needs and pool conditions.
New Pool Owners: For those just learning the ropes of pool maintenance, managing chemistry can be daunting. This product simplifies one crucial aspect: stabilizing pH. It helps prevent common issues like green water or skin irritation caused by fluctuating pH, making the learning curve smoother.
Experienced Pool Owners: Even veterans of pool care appreciate reliable and cost-effective solutions. The 50 lb bulk bag offers convenience and savings for those who consistently monitor and adjust their pool’s total alkalinity, ensuring consistent water quality throughout the season.
Owners of Large Pools: Larger pools naturally require more chemicals to adjust their water chemistry. The 50 lb size of In The Swim Alkalinity Up is particularly beneficial for big swimming pools, providing ample product for multiple adjustments without the need for frequent restocking.
Pools Prone to pH Bounce: Some pools, due to local water sources, heavy bather loads, or frequent rain, are more susceptible to rapid pH fluctuations. This alkalinity increaser is a lifesaver for such situations, providing the necessary buffering capacity to keep pH stable.
Saltwater Pool Owners: Saltwater chlorine generators (SWCGs) tend to cause pH to rise over time. While this product primarily raises alkalinity, a stable alkalinity level helps the SWCG operate more efficiently and makes pH adjustments more predictable. Maintaining proper TA is vital for these systems.
Commercial Pool Operators: For hotels, community pools, or other commercial facilities, maintaining impeccable water quality is paramount for public health and safety. The bulk packaging and proven effectiveness of In The Swim Alkalinity Up make it a practical choice for high-demand environments.
Those Seeking Equipment Protection: Pool owners concerned about the longevity of their pool’s plaster, liners, and metal components should prioritize balanced water chemistry. This product directly contributes to preventing the corrosive or scale-forming conditions that can damage expensive pool equipment over time.
Budget-Conscious Buyers: The 50 lb bag offers excellent value, making it an economical choice for maintaining pool chemistry. Buying in bulk reduces the overall cost per application, which is a significant advantage for those looking to manage their pool expenses efficiently.
If you find yourself constantly battling inconsistent pH levels, experiencing cloudy water after rain, or noticing signs of corrosion on your pool equipment, then the In The Swim Alkalinity Up is likely an excellent investment for your pool care regimen. It provides a foundational element for stable and healthy pool water.
Ultimately, anyone committed to proactive pool maintenance and desiring a clean, safe, and pleasant swimming environment will find this product to be an invaluable addition to their chemical arsenal. It simplifies one of the most critical aspects of pool water balance.
FAQ about In The Swim Alkalinity Up
Here are some frequently asked questions about total alkalinity and the In The Swim Alkalinity Up product, along with detailed answers to help you maintain your pool.
Q1: What is total alkalinity and why is it important for my pool?
Total alkalinity (TA) refers to the measure of alkaline substances, primarily bicarbonates, in your pool water. It acts as a buffer, preventing sudden and drastic changes in your pool’s pH level. Maintaining TA within the ideal range (80-120 ppm) is crucial because it stabilizes pH, protects equipment from corrosion, and ensures your sanitizer works effectively.
Without sufficient TA, your pH can fluctuate wildly, leading to ‘pH bounce.’ This instability can cause skin and eye irritation for swimmers, damage pool surfaces and equipment, and diminish the sanitizing power of chlorine, potentially leading to algae or bacterial growth.
Q2: How do I use In The Swim Alkalinity Up? What’s the dosage?
Before adding any chemicals, always test your pool water to determine its current total alkalinity level. The general guideline for In The Swim Alkalinity Up is to add approximately 1.5 pounds per 10,000 gallons of water to raise total alkalinity by 10 ppm.
It’s best to dissolve the measured amount in a bucket of water first to prevent temporary clouding and ensure even distribution. Then, slowly pour the solution around the perimeter of the pool, preferably near the return jets, while the pump is running. Allow several hours for circulation and retest before adding more.
Q3: Can it cause cloudy water? How do I prevent it?
Yes, like many granular pool chemicals, In The Swim Alkalinity Up can temporarily cause cloudiness if added too quickly or in too large a quantity directly to the pool. This is usually due to undissolved particles scattering light and is generally harmless.
To prevent cloudiness, always pre-dissolve the product in a bucket of water before adding it to the pool. Add it slowly around the pool’s edge, and ensure your pump is running to aid circulation. Avoid adding large doses all at once; if a significant adjustment is needed, split it into smaller increments over several hours or days.
Q4: How often should I test and adjust total alkalinity?
You should test your pool’s total alkalinity at least once a week, or more frequently if you experience heavy rain, high bather loads, or are making other chemical adjustments. Consistent testing allows you to catch and correct imbalances before they become significant problems.
Adjustments should be made as needed to keep the TA level within the ideal range of 80-120 ppm. Regular monitoring is key to proactive pool maintenance and preventing costly issues down the line.
Q5: Is this product safe for all pool types (vinyl, plaster, fiberglass)?
Yes, In The Swim Alkalinity Up (sodium bicarbonate) is safe and effective for use in all common pool types, including vinyl liners, plaster, fiberglass, and pebble finishes. It is a widely accepted and standard chemical for pool water balancing.
Its primary goal is to adjust water chemistry without negatively impacting pool surfaces, provided it is used according to directions and proper dissolution techniques are followed. This ensures it won’t cause staining or damage to your pool’s interior.
Q6: What’s the difference between alkalinity up and pH increaser?
While both can influence pH, their primary functions differ. Alkalinity Up (sodium bicarbonate) primarily raises total alkalinity, which then acts as a buffer to stabilize pH. It has a mild effect on pH, typically raising it slightly.
pH Increaser (soda ash or sodium carbonate), on the other hand, is specifically designed to raise pH more directly and significantly. While it also slightly increases total alkalinity, its main purpose is pH adjustment. You’d use alkalinity up for pH stability, and pH increaser for direct pH elevation if it’s too low.
Q7: How should I store the 50 lb bag of alkalinity up?
To maintain the product’s effectiveness and ensure safety, store the 50 lb bag of In The Swim Alkalinity Up in a cool, dry, and well-ventilated area. Keep it off the ground, away from direct sunlight, and protected from moisture, which can cause clumping and degradation.
Always keep the bag tightly sealed when not in use and store it out of reach of children and pets. Avoid storing it near other incompatible chemicals, especially acids, to prevent dangerous reactions.
Q8: Can I use this product with a saltwater chlorine generator?
Absolutely. In The Swim Alkalinity Up is completely compatible with saltwater chlorine generators (SWCGs). In fact, maintaining proper total alkalinity is particularly important for saltwater pools, as SWCGs can cause pH to gradually rise.
By keeping alkalinity stable, you help buffer this pH rise and ensure your SWCG operates at peak efficiency. Regular testing and adjustment of TA are just as crucial for saltwater pools as they are for traditional chlorine pools.
Final Verdict
After a thorough review, the In The Swim Alkalinity Up, in its convenient 50 lb Solvay Bicar Sodium Bicarbonate formulation, stands out as an excellent and essential product for maintaining optimal pool water chemistry. Its primary strength lies in its ability to effectively raise and stabilize total alkalinity, which is the cornerstone of pH balance in any swimming pool.
The product’s high-quality granular form ensures consistent performance and relatively easy application, provided users follow proper dissolution techniques to avoid temporary cloudiness. The bulk 50 lb packaging offers significant cost savings and convenience, especially for larger pools or those requiring frequent adjustments, making it a smart economic choice for dedicated pool owners.
Beyond just balancing chemicals, this alkalinity increaser plays a crucial role in protecting your valuable pool equipment and surfaces from the damaging effects of corrosive water. By mitigating pH bounce, it also ensures your sanitizers, like chlorine, work at their most efficient levels, contributing to a healthier and clearer swimming environment.
While the heavy bag might be a minor handling challenge for some, and precise measurement is always required, these small considerations are easily outweighed by the substantial benefits. Its compatibility with all pool types and sanitization systems further solidifies its position as a versatile and reliable pool care staple.
For any pool owner seeking to simplify their water chemistry management, prevent common pool problems, and extend the life of their investment, the In The Swim Alkalinity Up is a highly recommended purchase. It provides the foundational stability needed for a truly enjoyable and worry-free swimming season.
Investing in a quality alkalinity increaser like this one is not just about adding a chemical; it’s about investing in the long-term health, safety, and enjoyment of your pool. This product delivers on its promise of reliable performance and excellent value.
