Zodiac pH Down Tablets Dry Acid pH & Total Alkalinity Reducer 2kg – Pool Chemical
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Simple Tablet Dosing for pH and Alkalinity Control
Zodiac pH Down Tablets reduce high pH and Total Alkalinity in swimming pool water using a convenient dry acid tablet format. Each 200g tablet provides a pre-measured dose to make regular water balancing easier.
Correct pH supports swimmer comfort, chlorine performance and better overall water balance. The tablet format also offers the dry acid benefits of no liquid acid fumes, easier storage and simple handling.
Features & Benefits
- Reduces high pH: Helps bring elevated pH back toward the recommended swimming pool range for better comfort, clarity and chlorine performance.
- Reduces Total Alkalinity: Helps lower Total Alkalinity as part of acid-based pool water balancing.
- Helps manage scale conditions: Lowering high pH helps reduce water conditions that can contribute to scale formation and cloudy water.
- Pre-measured tablet dosing: 10 x 200g tablets provide convenient dosing for regular pool water balancing.
- Easier dry acid handling: Tablet format is easier to store, transport and handle than liquid acid, with no liquid acid fumes.
- Suitable for different pool systems: Suitable for chlorinated, salt and mineral pools as part of regular water balance maintenance.
- Useful for small metal spots: The acidic tablet format can help lift localised metal deposits from pool surfaces and bring them back into solution.
Dosage & Coverage
- To reduce Total Alkalinity by 10ppm: Add 1 tablet per 25,000 litres.
- To reduce pH by 0.2: Add 1 tablet per 25,000 litres.
- Frequency: Test pH weekly and adjust only when required.
Important Usage Information
- Always test pool water before dosing and follow the product label directions.
- Do not overdose. Low pH can be corrosive to pool surfaces, fittings and equipment.
- For stain treatment, use tablets only for small localised metal spots, not broad stain treatment.
- Keep the product dry, tightly closed and away from moisture.
- Do not mix with other pool chemicals.
Ideal pH range for swimming pool water is 7.2–7.8.
A Better Pool Experience Starts with the Right Chemistry
Zodiac pool chemicals support the key parts of everyday water care, from balance and sanitising to algae prevention, clarity, stain control and equipment protection.
Each product has a clear role in helping pool water stay cleaner, more comfortable and easier to manage, so the pool feels ready to enjoy more often.
Frequently Asked Questions
Are pH Down Tablets the same as granular pH Down?
They use the same active ingredient, sodium bisulphate, but the format is different. pH Down Tablets are pre-measured 200g tablets, while granular pH Down is loose dry acid for measured dosing.
When are pH Down Tablets a useful option?
pH Down Tablets are useful when a pre-measured 200g dry acid dose suits the required adjustment. They are also handy for small localised metal spots where the tablet format allows targeted treatment.
Can pH Down Tablets reduce both pH and Total Alkalinity?
Yes. Zodiac pH Down Tablets are designed to decrease pH and Total Alkalinity in swimming pools. Always dose according to your pool volume and current water test result.
How do pH Down Tablets help with metal stains?
pH Down Tablets are made from sodium bisulphate dry acid. For small localised metal stains, the acidic tablet can help react with metallic deposits on the pool surface and bring them back into solution. Larger or older staining may need Zodiac All-In-One Stain Remover, while Zodiac Metal Remover can help bind metals in the water and reduce the chance of staining returning.
Why should I retest before adding more tablets?
Acid continues to affect water balance as it circulates. Retesting helps avoid overdosing, which can push pH too low and create corrosive water conditions.
Why does high pH need correcting?
High pH can make chlorine less effective and may contribute to cloudy water, scale-forming conditions and swimmer discomfort. Keeping pH in range helps the pool stay easier to manage.
Image shows product in new packaging design. Actual product received may vary while previous label design is being sold through.
| SKU | WPQPHDTAB2 |
|---|---|
| GTIN | 9329173010892 |
| Barcode | WPQPHDTAB2 |
| Brand | Zodiac |
| Model | WPQPHDTAB2 - pH Down Tablets (10 x 200g) 2kg Jar |
| Product Type | Pool Chemical |
| Shipping Type | Standard |
| Chemical Type | Balancers |
| Chemical Function | Alkalinity Down, pH Down |
| Active Constituents | Sodium bisulphate: 1000g/kg |
Shipping
Same-day dispatch applies to orders received by 12.00 pm (AEST) during business days. Orders received after 12.00 pm and on weekends or public holidays will be dispatched on the next business day.
Delivery fees are $19.95 flat-rate per order Australia-wide, no matter how many products are in it. Orders containing bulky items like sand filters, acoustic boxes, heat pumps, pool covers, and pool slides may incur additional fees as they require specialized carriers.
Below are the estimated time to arrival in business days once an order is shipped.
| Destination | Sydney | NSW | VIC | QLD | SA | WA/NT |
|---|---|---|---|---|---|---|
| Business Days | 1 - 2 | 2 - 4 | 2 - 4 | 2 - 4 | 3 - 4 | 5 - 6 |
Rural and remote addresses, where delivery is not provided every day, may take longer.
Returns
Satisfaction Guarantee: If you are not satisfied with a product for any reason, you are welcome to return it to us for a full refund or exchange within 30 days of the purchase date - even if you have used the product. Returns are free, and we will cover return shipping.
We take full responsibility for the safe arrival of the products that you order from us. We will replace at our expense any product that arrives faulty, damaged during transit, or is the incorrect product. Click here for details
If you have any questions about our shipping policy or our return policy, please contact us on 1300 766 619 or through our contact us form.