Slow-Dissolving Tablets for Consistent Chlorine Care
Zodiac Stabilised Pool Chlorine Tablets, also known as Trichlor tablets, are slow-dissolving chlorine tablets for floaters, feeders and skimmer baskets. They help control bacteria, viruses and algae, supporting cleaner pool water with easy ongoing sanitising.
Each 200g tablet provides a pre-measured chlorine dose for pools up to 20,000 litres. With built-in stabiliser and UV blockout, these tablets help chlorine last longer in outdoor pool water, making them a practical option for weekly maintenance, holidays or winter chlorine support.
Features & Benefits
- Controls bacteria, viruses and algae: Helps maintain sanitised swimming pool water for regular pool use.
- Pre-measured 200g tablets: Easy to dose, with 1 tablet suitable for up to 20,000 litres.
- Slow-dissolving Trichlor: Designed for steady chlorine release through a floater, feeder or skimmer basket.
- Built-in stabiliser / UV blockout: Helps protect chlorine from sunlight so it lasts longer in outdoor pool water.
- Individually wrapped tablets: Supports safer, more comfortable handling.
- High-strength chlorine: Trichlor provides 90% available chlorine for reliable maintenance sanitising.
- Useful maintenance option: Ideal for once-a-week application, holidays or winter use as an alternative to salt chlorination.
Dosage & Coverage
- Standard dose: 1 tablet per 20,000 litres.
- Pack size: 5 x 200g tablets per 1kg pack.
Important Usage Information
- Use tablets in a floating dispenser, automatic tablet dispensing device or skimmer basket.
- Tablet dissolving rate will vary depending on water flow and temperature.
- Always check cyanuric acid levels before use. If levels are above 100ppm, consider using a non-stabilised chlorine.
- For pools with ORP probes or automated chlorinator controls, cyanuric acid should be kept low, as high stabiliser levels can affect probe performance.
- Trichlor has a low pH of 2.5–3, so pH and Total Alkalinity should be tested regularly during use.
- Do not place tablets directly on pool surfaces.
- Store in a cool, dry, well-ventilated area away from acids and incompatible products.
- Always follow the product label directions and safety instructions.
Recommended pool levels: free chlorine 2-4ppm, combined chlorine less than 0.2ppm, and cyanuric acid 10-50ppm. For ORP/probe systems, cyanuric acid should be kept under 20ppm.
This product is classified as Dangerous Goods. It is an oxidising solid, so keep away from heat, ignition sources, acids and combustible materials.
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
When are chlorine tablets a good choice?
Chlorine tablets are useful when you want slow, steady chlorine release for routine maintenance. They are especially convenient for weekly dosing, short holidays or winter pool care when chlorine demand is usually lower.
How are Trichlor tablets different from Dichlor granules?
Trichlor tablets are slow dissolving and designed for floaters, feeders or skimmer baskets. Dichlor granules dissolve quickly and are better suited to fast chlorine dosing or chlorine boosts. Trichlor also has a lower pH, so pH and Total Alkalinity need regular checking.
Why should cyanuric acid be checked before using stabilised chlorine tablets?
Stabilised chlorine tablets add cyanuric acid to the water. The right level helps protect chlorine from sunlight, but too much can reduce chlorine effectiveness. If cyanuric acid is above 100ppm, a non-stabilised chlorine such as Zodiac Pool Chlorine may be more suitable.
Can these tablets be used in a saltwater pool?
Yes. Stabilised Pool Chlorine Tablets can be used in saltwater pools as a maintenance or winter chlorine option, provided cyanuric acid levels are suitable and the tablets are used in a proper dispenser or skimmer basket.
Why does the tablet dissolving rate vary?
The dissolving rate depends on water flow and water temperature. Tablets usually dissolve faster with stronger circulation or warmer water, and more slowly in cooler conditions or lower-flow dispensers.
Can I put chlorine tablets directly in the pool?
No. These tablets should be used in a floating dispenser, automatic tablet dispensing device or skimmer basket. Placing concentrated Trichlor tablets directly on pool surfaces can cause localised bleaching or surface damage.
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