What TCCA 90 is
TCCA (trichloroisocyanuric acid) 90 granules contain 90% available chlorine. Chemtex Pool Chlor is sunlight-stable and leaves no white turbidity, which is why it is widely used for home, society and club pools.
How much to use
1–1.5 kg per 1,00,000 litres of pool water, at least once a fortnight. Scale to your pool volume (see volume and dose guide); a 50,000-litre pool needs 0.5–0.75 kg per dose.
How to add it
- Test pH and chlorine; adjust pH to 7.2–7.6 first.
- Dissolve the granules in about 5 litres of water in a plastic bucket.
- Pour the solution along the pool sides with the filter running.
- Circulate for 1–2 hours before anyone swims.
TCCA is mildly acidic
Each fortnightly dose lowers pH slightly. Many owners find the water turning acidic over a season, with stinging eyes and corrosion on ladders. Test regularly and use Pool Build to restore pH when it falls below 7.2.
Which pack size
The 5 kg jar suits larger pools and regular schedules. The 1 kg jars in a pack of three are easier to store and measure for small pools.
Handling and safety
- Never mix chlorine granules with acids or other pool chemicals; add each product separately.
- Store in a cool, dry, ventilated place, tightly closed and away from children.
- Wear gloves and eye protection when handling.
- Always dissolve granules in a bucket of clean water first, and use a dedicated bucket for each product.
Common questions
How much TCCA 90 should I add to my pool?
1 to 1.5 kg per 1,00,000 litres of pool water, at least once a fortnight. For a 50,000 litre pool that is 0.5 to 0.75 kg.
Do I need to dissolve chlorine granules before adding them?
Yes. Dissolve in about 5 litres of water, pour along the pool sides, and circulate for 1 to 2 hours before swimming.
What does TCCA 90 mean?
TCCA is trichloroisocyanuric acid, and 90 refers to its roughly 90 per cent available chlorine content.
Does TCCA lower the pH of pool water?
Yes, TCCA is mildly acidic and lowers pH a little with each dose, so test regularly and correct with an alkalinity increaser if pH falls below 7.2.
How often should I add chlorine to my pool?
At least once a fortnight at the recommended dose, with testing in between and extra dosing in heavy-use or hot weather.
Products used in this guide
Need help with dosing for a hotel, club or society pool? Call +91-90739-38217 or contact us. Delivery across India, dispatched within 24 working hours.