Viva Blu Fast Acting Chlorine Cyanuric acid Tablets – 1KG

200g each
Pack of 5 x 200g Cyanuric acid tablets

Optimal Pool Maintenance

Controls algae and bacteria in outdoor pools
Effectively kills algae
Balances pH levels
Minimises chlorine loss from sunlight

Active Ingredients:

200g Trichloroisocyanurate (Cyanuric acid)
Minimum available chlorine: 900g/kg as trichloroisocyanuric acid
Copper: 7.5g/kg as copper sulphate pentahydrate

Features & Benefits

Contains isocyanurate acid
Maintains low pH for efficient chlorine use
Potent chlorine for effective sanitation
Slow-dissolving, long-lasting formula
Eliminates daily dosing
Reduces the need for additional cyanuric acid
Perfect for pool cleaning, acid wash

Application / Dosage

Use one tablet per 20,000 litres in a floating dispenser
Dosage rates are guidelines

Technical Reference

Technical Specifications

Property	Detail
Chemical Name	Trichloroisocyanuric Acid (with Copper Sulphate Pentahydrate)
IUPAC Name	1,3,5-trichloro-1,3,5-triazinane-2,4,6-trione
Common Names	TCCA; trichlor; chlorine tablets; stabilised chlorine; trichlorocyanuric acid
Molecular Formula	C₃Cl₃N₃O₃
CAS Number	87-90-1 (TCCA); 7758-99-8 (Copper Sulphate Pentahydrate)
Active Ingredient Concentration	Trichloroisocyanuric acid: 900 g/kg minimum available chlorine; Copper sulphate pentahydrate: 7.5 g/kg (as copper)
Physical State	Solid (compressed tablet)
Appearance	White to off-white compressed tablet, characteristic chlorine odour
Tablet Weight	200 g per tablet; 5 tablets per 1 kg pack
Density (bulk)	Approximately 0.9–1.0 g/cm³
pH (1% aqueous solution)	2.7–3.3 (acidic; lowers pool pH upon dissolution)
Solubility in Water (25°C)	Approximately 1.2 g/100 mL (slow dissolving — by design)
Available Chlorine	≥90% w/w (minimum 900 g/kg)
Stabiliser (Cyanuric Acid)	Inherently generated upon dissolution; contributes to pool cyanuric acid levels
UN Number	UN 2468
ADG Class	Class 5.1 (Oxidising Agent), Subsidiary Risk: Class 8 (Corrosive)
Packing Group	II

Applications & Use Cases

Outdoor residential swimming pool sanitation: Primary disinfection of backyard pools across Australia, particularly suited to outdoor pools exposed to UV degradation of chlorine.
Outdoor commercial pool sanitation: Holiday parks, motels, and resort pools where continuous low-level chlorination is required between manual dosing events.
Algae prevention and control: Continuous low-level free chlorine residual suppresses green, yellow, and black algae growth in pool water.
Bacterial disinfection: Effective against Pseudomonas aeruginosa, E. coli, Staphylococcus aureus, and other common pool pathogens at appropriate free chlorine residuals.
Floating dispenser and skimmer basket dosing: Slow-dissolving tablet format designed for use in floating dispensers or in-line tablet feeders for sustained chlorine release.
Copper-assisted algae control: The copper sulphate pentahydrate component provides supplementary algaecidal action, particularly effective against persistent blue-green algal blooms.
Water feature and ornamental pond sanitation: Where low-volume, infrequent dosing is required in shaded or semi-exposed outdoor environments (not for use where fish or aquatic life are present).
School and community pool maintenance: Suitable for supervised facilities requiring reliable chlorine delivery between professional service visits.

Dosing Rates & Guidelines

Application	Minimum Effective Dose	Recommended Dose	Maximum Safe Dose	Units	Notes
Residential outdoor pool — routine maintenance	1 tablet per 40,000 L	1 tablet per 20,000 L	2 tablets per 20,000 L	200 g tablet per volume (L)	Replace tablet when 50–75% dissolved. Target free chlorine: 1.0–3.0 mg/L. Adjust based on bather load, temperature, and sunlight exposure.
Commercial outdoor pool — routine maintenance	1 tablet per 20,000 L	1 tablet per 15,000 L	As required to maintain 3.0 mg/L free chlorine	200 g tablet per volume (L)	High bather load or temperature above 30°C increases chlorine demand. Test free chlorine minimum twice daily. Refer to SPASA guidelines.
Shock dosing / breakpoint chlorination (via granular product preferred)	Tablets are not recommended as the primary shock dosing method			—	Use unstabilised granular calcium hypochlorite or sodium hypochlorite for shock treatment. Tablets dissolve too slowly for effective breakpoint chlorination.
Free chlorine residual target (pool water)	1.0 mg/L	1.5–3.0 mg/L	5.0 mg/L (short term)	mg/L (ppm)	Optimal efficacy at pH 7.2–7.6. Above pH 7.8, chlorine efficacy is significantly reduced. At pH 8.0, effective chlorine is less than 20% of total free chlorine.
Cyanuric acid (stabiliser) accumulation	Target: 30 mg/L	30–50 mg/L	100 mg/L (regulatory limit in many Australian states)	mg/L (ppm)	Each 200 g tablet contributes approximately 57 g of cyanuric acid to the pool water upon complete dissolution. Monitor CYA levels monthly and dilute pool water if levels exceed 80–100 mg/L.
Copper residual (from copper sulphate component)	0.1 mg/L	0.1–0.3 mg/L	1.0 mg/L (AS/NZS 4020 guideline)	mg/L (ppm)	Monitor total copper in pool water quarterly. Elevated copper levels may cause staining of pool surfaces and green discolouration of blonde hair. Copper is toxic to fish and aquatic organisms.

Key Water Chemistry Parameters for Effective Chlorination:

Parameter	Minimum	Ideal Range	Maximum
pH	7.2	7.2–7.6	7.8
Total Alkalinity	80 mg/L	80–120 mg/L	200 mg/L
Calcium Hardness	200 mg/L	200–400 mg/L	500 mg/L
Cyanuric Acid (Stabiliser)	30 mg/L	30–50 mg/L	100 mg/L
Free Chlorine Residual	1.0 mg/L	1.5–3.0 mg/L	5.0 mg/L
Combined Chlorine	—	<0.5 mg/L	0.5 mg/L (trigger for shock dosing)
Water Temperature	—	18–30°C	40°C (review dosing above 30°C)

Dilution Instructions

Important: Trichloroisocyanuric acid tablets are a potent oxidising agent. They must never be dissolved in concentrated form and added directly to pool water near bathers, surfaces, or pool fittings. Always follow the procedure below.

Equipment required: Chemical-resistant gloves (nitrile or neoprene, minimum 0.4 mm thickness), safety goggles or face shield, clean floating dispenser or in-line tablet feeder rated for oxidising chemicals, pool test kit (DPD method recommended).
Step 1 — Test water chemistry first: Before introducing tablets, test and adjust pool pH to between 7.2 and 7.6, and total alkalinity to 80–120 mg/L. Correct pH imbalances before adding chlorine. Do not add tablets to a pool with pH above 7.8 — chlorine efficacy will be severely reduced.
Step 2 — Do not dissolve tablets in a bucket of water: Unlike granular products, these tablets are designed for in-situ slow dissolution only. Never dissolve tablets in a bucket and pour concentrated solution into pool water — this creates a dangerously corrosive, high-concentration chlorine solution that can damage pool surfaces and equipment.
Step 3 — Load dispenser away from pool: Place the required number of tablets directly into a clean, dry floating dispenser or in-line feeder. Do not mix tablet types or brands in the same dispenser. Ensure the dispenser is completely dry before loading — any moisture present during loading can initiate a vigorous exothermic reaction if tablets contact incompatible chemicals.
Step 4 — Set dispenser flow rate: Adjust the dispenser vent openings to control dissolution rate. Begin at a mid-range setting and monitor free chlorine levels over 24–48 hours. Adjust to maintain free chlorine between 1.5 and 3.0 mg/L.
Step 5 — Place dispenser in pool: Float the dispenser in the pool away from pool walls, steps, and skimmer inlets. Never allow tablets to rest directly on pool surfaces or in the skimmer basket when the pump is running, as concentrated chlorinated water can bleach or etch vinyl, fibreglass, and concrete surfaces.
Step 6 — Monitor and adjust: Test free chlorine and pH daily during initial commissioning, then at a minimum every 2–3 days during routine operation. Record readings and adjust tablet count or dispenser setting accordingly.
Step 7 — Handling spent tablets: Do not handle partially dissolved tablets with your bare hands. Use gloves. Do not return unused or partially dissolved tablets to the original packaging if contaminated with moisture or foreign material.

Chemical Compatibility

Compatible with (under correct conditions):

pH adjustment chemicals — sodium carbonate (soda ash) and sodium bicarbonate, provided they are added separately, and the pool water is circulating. Allow a minimum 30 minutes between additions of different chemicals.
Calcium hardness increaser (calcium chloride) — compatible when added separately at least 30 minutes apart.
Algaecides (quaternary ammonium or polyquat types) — compatible in pool water at correct concentrations; do not mix concentrated products together.
Flocculating and clarifying agents (aluminium sulphate, polyacrylamide) — compatible in dilute pool water conditions.
Standard pool filter media — compatible with sand, glass media, and cartridge filters at normal operating concentrations.

Incompatible with — DO NOT mix, combine, or store in proximity:

Calcium hypochlorite (granular or tablet): Extremely hazardous. Mixing TCCA with calcium hypochlorite, even in small quantities or via contaminated scoops, can cause an immediate, violent exothermic reaction, fire, and release of toxic chlorine gas. This combination has caused multiple fatalities and serious injuries in Australia. Store in completely separate, locked locations. Never use the same scoop or dispenser for both products.
Sodium hypochlorite (liquid chlorine, pool liquid): Contact between concentrated liquid chlorine and TCCA tablets can generate chlorine gas and cause fire. Do not add liquid chlorine to a skimmer basket or feeder containing TCCA tablets.
Concentrated acids (hydrochloric acid, muriatic acid, sulphuric acid)

Weight	1.2 kg
Dimensions	15 × 15 × 10 cm

0402 981 808

0402 981 808

Chlorine Tablets – 1kg (5 tablets)