In The Swim pH Increaser for Pools - Granular Soda Ash to Raise pH

Our review of the In The Swim pH Increaser finds it best for pool owners who need a straightforward, cost-effective way to raise pH and stabilize alkalinity. The single biggest reason to buy is its simple, proven chemistry: 100% sodium carbonate (soda ash) that raises pH and total alkalinity without bulky additives or complex dosing. For those managing seasonal swings or correcting acidic water after heavy rain or acid-based treatments, this granular formula dissolves readily and treats large volumes from a single 25 pound bag.

Key Features

• Raises pH and alkalinity: The soda ash formulation increases both pH and total alkalinity to prevent rapid swings and keep water balanced.
• Corrects acidic water: Designed to correct low pH conditions quickly so swimmers avoid eye irritation and discomfort.
• Bulk 25 pound bag: A large bag provides volume pricing and fewer trips to restock for medium and large pools.
• Easy to apply: The granular soda ash dissolves easily and distributes through circulation systems without clumping at the bottom.
• Helps water clarity: Many users report clearer water after balancing pH, as proper pH improves sanitizer effectiveness.

Who It's For

This product suits homeowners with in-ground and above-ground pools who perform regular chemical maintenance and want a no-frills pH increaser in bulk. It is also a good match for those who prefer granular additives that dissolve quickly and allow precise dosing when following test results.

Less appropriate for pool owners who need combined alkalinity-only adjustments or who prefer premixed liquid treatments; if you require a combined multi-chemical balancer or very small, incremental doses, consider alternate products tailored to those needs.

Pros & Cons

Pros

• Effective at raising pH and stabilizing total alkalinity when used as directed.
• Large 25 pound bag offers strong value for regular maintenance and multiple treatments.
• Granular soda ash dissolves quickly and is reported to avoid clumping in circulation systems.
• Many users note improved water clarity after balancing pH, indicating better sanitizer performance.

Cons

• Some users report temporary cloudiness after application, so follow dosing and circulation guidance.
• Not a tailored alkalinity-only product; it raises both pH and alkalinity simultaneously.

Specifications

Our Verdict

For DIY pool keepers who want a reliable, economical way to raise pH and stabilize alkalinity, this granular soda ash is a practical choice. The 25 pound bag delivers value and effective pH correction, and when used with proper testing it helps maintain comfortable, clear water without complicated dosing.

Frequently Asked Questions

How quickly does it change pH?
It begins to raise pH as it dissolves; allow full circulation and retest after a few hours to confirm levels.

Will it affect total alkalinity?
Yes, sodium carbonate raises total alkalinity along with pH, which helps prevent pH bounce.

Is it easy to apply?
Yes, the granular formula dissolves readily and can be broadcast while the pump runs, following package dosing and safety guidance.