AquaChek Pro 5-in-1 vs AquaChek Silver 7-Way Test Strips: Which Pool-Water Test Is Best?

Correct swimming-pool water testing is not only about keeping the water clear. It helps protect swimmers, pool surfaces, pumps, filters, chlorinators and other expensive equipment.

Two popular professional-quality options are the AquaChek Pro 5-in-1 Pool and Spa Test Strips and the more comprehensive AquaChek Silver 7-Way Test Strips.

Both products provide fast results without liquid reagents, but they are designed for slightly different practical applications.

In this guide, Swemgat compares the two products and explains when each test strip is the better choice.

Quick Comparison: AquaChek Pro vs AquaChek Silver

Measurement	AquaChek Pro 5-in-1	AquaChek Silver 7-Way
Free chlorine	Yes	Yes
Total chlorine	Yes	Yes
Total bromine	Yes	Yes
pH	Yes	Yes
Total alkalinity	Yes	Yes
Total hardness	No	Yes
Cyanuric acid or stabiliser	No	Yes
Salt level	No	No
Strips per bottle	100	100
Best application	Routine maintenance	Comprehensive water analysis

The main difference is simple:

AquaChek Pro is ideal for regular day-to-day testing, while AquaChek Silver adds total hardness and cyanuric acid testing for more complete water-balance analysis. 

What Does AquaChek Pro 5-in-1 Test?

AquaChek Pro 5-in-1 measures five important pool and spa water parameters:

1. Free chlorine
2. Total chlorine
3. Total bromine
4. pH
5. Total alkalinity

These are the measurements most frequently needed when checking whether pool water is properly sanitised and reasonably balanced.

Each bottle contains 100 test strips, making it practical for swimming-pool owners, pool technicians, maintenance teams, guest houses, schools and commercial facilities that test water regularly. 

Practical Uses for AquaChek Pro

AquaChek Pro is particularly useful for:

• Weekly residential pool-water testing
• Routine pool-cleaning visits
• Checking chlorine before swimming
• Monitoring pH after adding chemicals
• Checking alkalinity before adjusting pH
• Testing spa and hot-tub water
• Confirming whether a green or cloudy pool requires more sanitiser
• Regular testing by technicians servicing several pools

For most routine maintenance visits, these five readings provide the information needed to make basic chlorine, pH and alkalinity adjustments.

What Does AquaChek Silver 7-Way Test?

AquaChek Silver tests the same five measurements as AquaChek Pro, but adds:

• 6. Total hardness
• 7. Cyanuric acid, also called stabiliser or chlorine protector

These two additional readings make AquaChek Silver more suitable for diagnosing long-term water-balance problems.

AquaChek Silver is therefore the more comprehensive option for pool owners and professionals who want a broader picture of the pool’s chemistry.

Practical Uses for AquaChek Silver

AquaChek Silver is particularly useful when:

• Taking responsibility for an unfamiliar swimming pool
• Testing a newly filled or renovated pool
• Investigating unusually high chlorine consumption
• Chlorine floaters are used regularly
• Stabilised granular chlorine is used frequently
• Chlorine appears ineffective despite a measurable reading
• White scale develops on mosaics or pool equipment
• A marble-plastered or cement-based pool surface feels rough
• There are concerns about calcium loss, surface pitting or scale
• Conducting a more comprehensive professional service inspection

When Is AquaChek Pro the Better Choice?

Choose AquaChek Pro 5-in-1 when your main purpose is frequent, economical testing of everyday pool conditions.

For example, a pool owner may test the water once or twice per week to check whether:

• There is sufficient free chlorine
• Total chlorine is becoming excessive
• The pH is within the desired range
• Total alkalinity requires correction
• The water is safe and comfortable for swimming

It is also a practical choice for pool technicians who already perform separate hardness, stabiliser and salt tests when needed.

Because the bottle contains 100 strips, AquaChek Pro is well suited to regular service work and repeated testing.

AquaChek Pro Is Best For:

• Routine residential pool maintenance
• Frequent chlorine and pH checks
• Pool-cleaning businesses
• Spas and hot tubs
• High-volume testing
• Owners who use separate specialised tests when required

When Is AquaChek Silver the Better Choice?

Choose AquaChek Silver 7-Way when you require a more complete assessment of the pool water.

The additional cyanuric acid and total-hardness readings can reveal problems that are not visible from chlorine, pH and alkalinity alone.

Example 1: Chlorine Is Being Used Too Quickly

Outdoor swimming pools lose chlorine through exposure to sunlight.

Cyanuric acid helps protect chlorine against rapid breakdown. When the stabiliser level is too low, the pool may use more chlorine than necessary.

In this situation, AquaChek Silver can help determine whether insufficient stabiliser may be contributing to high chlorine consumption.

Example 2: Chlorine Is Present but Not Working Properly

Regular use of chlorine floaters and stabilised chlorine products can gradually increase the cyanuric acid level.

When the level becomes excessive, chlorine can become less effective, even when a normal chlorine reading is visible on the test strip.

This condition is sometimes called chlorine lock, although the more accurate explanation is that excessive cyanuric acid reduces chlorine’s sanitising effectiveness.

AquaChek Silver can test cyanuric acid at levels of up to 300 ppm, according to the product information. 

Example 3: A Marble-Plastered Pool Is Becoming Rough

Cement-based and marble-plastered swimming-pool linings require properly balanced calcium hardness.

If the water contains too little calcium, it may draw calcium from the pool surface. Over time, this can contribute to roughness, surface deterioration and pitting.

AquaChek Silver’s total-hardness test can help identify whether low mineral hardness may be placing the pool surface at risk.

Example 4: White Scale Is Forming

High hardness, elevated pH and other water-balance conditions can contribute to white calcium deposits on:

• Mosaic tiles
• Pool walls
• Salt chlorinator cells
• Heating equipment
• Pipes and fittings
• Water features

A total-hardness reading provides useful information when investigating these deposits.

Why Free Chlorine and Total Chlorine Both Matter

Both AquaChek Pro and AquaChek Silver measure free chlorine and total chlorine.

Free Chlorine

Free chlorine is the chlorine still available to sanitise the pool water and kill bacteria, algae and other contaminants.

Total Chlorine

Total chlorine includes both free chlorine and chlorine that has already reacted with contaminants.

A significant difference between total chlorine and free chlorine may indicate the presence of combined chlorine or chloramines.

This can contribute to:

• Strong chlorine odours
• Eye irritation
• Uncomfortable swimming conditions
• Reduced sanitising performance

Testing both readings gives the pool owner or technician more useful information than testing only total chlorine.

Why pH Testing Is Essential

The pH reading affects swimmer comfort, chemical efficiency and the condition of pool equipment and surfaces.

When the pH is too low, the water may become aggressive and corrosive.

When the pH is too high:

• Chlorine becomes less effective
• Scale formation becomes more likely
• Water may turn cloudy
• Swimmers may experience discomfort

Both AquaChek Pro and AquaChek Silver provide a quick pH reading, making them suitable for regular water-balance checks.

Why Total Alkalinity Matters

Total alkalinity helps stabilise the pH.

When alkalinity is too low, the pH may change rapidly and become difficult to control. When alkalinity is too high, adjusting the pH can become difficult and scale or cloudy water may develop.

Always correct total alkalinity before repeatedly adding pH-adjustment chemicals. Otherwise, the pH may continue moving out of range.

Do These Test Strips Measure Pool Salt?

No.

Neither AquaChek Pro nor AquaChek Silver measures swimming-pool salt levels.

Salt testing is mainly required for pools fitted with saltwater chlorinators. The correct salt concentration is necessary for efficient chlorine production and proper chlorinator operation.

For a saltwater pool, use a dedicated product such as:

AquaChek Salt Test Strips for Chlorinator Owners

A salt chlorinator’s display can provide a useful indication, but a separate salt test is valuable when diagnosing warning lights, low chlorine production or possible chlorinator-cell problems.

Which AquaChek Test Strip Should a Pool Owner Buy?

The best choice depends on how the product will be used.

Choose AquaChek Pro 5-in-1 When:

• You mainly need weekly chlorine, pH and alkalinity testing
• You want 100 strips for frequent use
• You own a normally functioning residential pool
• You use separate products for salt, stabiliser and hardness testing
• You want a practical test for routine maintenance

Choose AquaChek Silver 7-Way When:

• You want a more comprehensive test on one strip
• You need to test cyanuric acid
• You need to monitor total hardness
• You use chlorine floaters or stabilised chlorine regularly
• You are investigating scale, surface damage or unusual chlorine use
• You maintain several pools professionally
• You are testing an unfamiliar, newly renovated or problematic pool

Recommended Testing Strategy for Pool Owners

For many residential swimming pools, the following approach is practical:

Every Week

Test:

• Free chlorine
• Total chlorine
• pH
• Total alkalinity

AquaChek Pro is well suited to these regular checks.

Periodically or When Problems Develop

Also test:

• Cyanuric acid
• Total hardness
• Salt, where a salt chlorinator is installed

AquaChek Silver can be used periodically to add hardness and stabiliser readings, while a separate salt strip should be used for salt concentration.

Pool chemistry can change more quickly during:

• Very hot weather
• Heavy rain
• Frequent swimming
• Algae treatment
• Chemical overdosing
• Pool refilling
• Extended filtration problems

Increase the testing frequency during these conditions.

How to Use AquaChek Pool Test Strips

For reliable results:

1. Remove one strip without touching the test pads.
2. Dip it into the pool water and remove it immediately.
3. Hold the strip level.
4. Allow the colours to develop according to the bottle instructions.
5. Compare each pad with the corresponding colour chart.
6. Record the results before adding chemicals.
7. Adjust one major water-balance problem at a time.

Take the water sample away from:

• Return jets
• The weir
• Chlorine floaters
• Chemical feeders
• Recently added chemicals

For large pools, it may be helpful to test the water at more than one point.

Important Test-Strip Storage Advice

Test strips can become unreliable when exposed to moisture, contaminated fingers or poor storage conditions.

To protect them:

• Close the bottle immediately after removing a strip
• Keep the container dry
• Do not touch the test pads
• Store the bottle away from direct sunlight
• Do not leave it in a hot vehicle or pump enclosure
  
• Never transfer wet strips back into the bottle

A test result is only useful when the testing product has been stored and handled correctly.

Final Verdict: AquaChek Pro or AquaChek Silver?

There is no single best product for every pool.

AquaChek Pro 5-in-1 is the practical choice for frequent everyday testing. It covers the key measurements needed to manage sanitiser, pH and alkalinity.

AquaChek Silver 7-Way is the better diagnostic and comprehensive testing option. It includes total hardness and cyanuric acid, which are especially important when protecting pool surfaces, managing stabilised chlorine and investigating recurring water-quality problems.

For pool technicians, keeping both products available can be a sensible strategy:

• Use AquaChek Pro for regular service checks
• Use AquaChek Silver for periodic assessments and problem pools
• Use separate AquaChek Salt Test Strips for saltwater chlorinator pools

Shop AquaChek Pool-Water Test Strips Online

Order professional-quality pool-water testing products online from Swemgat for courier delivery in South Africa. 

Shop AquaChek Pro 5-in-1 Test Strips:
https://swemgat.com/products/aquachek-pro-5-in-1-pool-water-test

Shop AquaChek Silver 7-Way Test Strips:
https://swemgat.com/products/aquachek-silver-fc-tc-ph-ta-ca-th-50-strips-for-professionals

Need help interpreting your pool-water test results? Send your readings and a photo of the pool to Swemgat on WhatsApp at 082 404 1533 during support hours, Monday to Friday, 09:00 to 16:00.

Don’t just own a pool — use it.