Pool
Arm & Hammer pH Boost — Professional Pool pH Booster, 39.6 lb (6-Pack)
Reviews
5.0/ 5
Brand ARM & HAMMER
- 5 stars 7
- 4 stars 0
- 3 stars 0
- 2 stars 0
- 1 star 0
Product description
What’s included: The package is a case of six individual recyclable paper/cardboard boxes, each about 6.6 lb, for a total of 39.6 lb. Each box contains granular material intended for manual dosing.
Composition and sizing: The active ingredient is sodium carbonate monohydrate (100%). The product is portioned into six 6.6 lb boxes, making it easy to handle, store and stack. It’s sized to suit spas, swim spas and smaller residential pools, though the total case gives several seasons’ worth of material for moderate-size pools.
How it’s used: This is a pH increaser designed to move pool water into the recommended 7.2–7.8 range. Users measure the recommended ounces per volume of water (instructions provide dosing guidance per 10,000 gallons), broadcast or pre-dissolve the granules as directed, then retest and adjust as needed. Regular use can reduce swimmer eye and skin irritation and helps prevent staining, corrosion and scaling on pool surfaces and equipment. It pairs well with bicarbonate alkalinity treatments to achieve balanced water chemistry.
Pros
- Effective, predictable pH increase
- Packaged in six smaller recyclable boxes for easier handling
- Dissolves cleanly with straightforward dosing guidance
Cons
- Boxes are fairly heavy to lift when full
- May require repeat treatments during a season
- Not formulated to address alkalinity alone
VerdictA straightforward, bulk pH corrector that reliably raises pool pH, dissolves cleanly and is simple to dose. It’s convenient for homeowners who prefer buying multiple small recyclable boxes rather than single large drums, and it helps protect surfaces and improve swimmer comfort.
Reviews
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eaca 5/5
Familiar brand with straightforward directions
I’ve used the brand’s baking soda before, so this felt like a natural choice. Directions give exact amounts for different pool sizes, and the case offers enough material to keep on hand for routine maintenance.
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chiayijen 5/5
Very effective pH raiser
I use this in my in-ground pool to raise pH and it performs well. It produces consistent results and is easy to add. I’d recommend it to other pool owners.
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Vine reviewer 5/5
Reliable at correcting low pH
When my pool dropped to 6.6 I added 32 oz for a 21k gallon pool and it brought pH back into range. The granules dissolve cleanly without leaving residue or cloudiness, and they measure easily without clumping. A dependable option for routine pH correction.
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Just Benjamin 5/5
Bulk boost makes pool maintenance simpler
Using this in a 20,000-gallon pool, I was surprised by how little product was needed to change pH. The formulation is sodium carbonate monohydrate and the case comes as six 3 kg/6.6 lb cardboard boxes. It’s a convenient bulk buy for anyone who prefers to stock up and store properly.
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Lefthandrea 5/5
Did the job fast
I applied this toward the end of the season to raise levels before closing. It raised pH quickly as advertised and left the water clear. Good value for routine use.
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Apes0821 5/5
Great value and dissolves quickly
I gave five stars because the deal is solid. I used one box before closing and it performed similarly to other brand pucks I like, though the granules dissolve a bit faster. My water stayed clear and balanced at closing; keep in mind the boxes are large and heavy.
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RobF 5/5
Large quantity with clear dosing guidance
Good volume for a 25,000-gallon pool; this supply will last for years. The label includes a handy chart showing how many ounces to add per 10K gallons, so calculating doses is simple. I usually need to raise pH a few times per season, so one box covers a season for me.
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