Viva Blu Fast Acting Chlorine (Cyanuric acid) Tablets – 200g
- 200g each
- Single pack of a 200g Cyanuric acid tablet
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
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; Stabilised Chlorine Tablet; Cyanuric Chlorine |
| Molecular Formula (TCCA) | C₃Cl₃N₃O₃ |
| CAS Number (TCCA) | 87-90-1 |
| Molecular Weight | 232.41 g/mol |
| Tablet Weight | 200 g per tablet |
| Active Ingredient — Available Chlorine | Minimum 900 g/kg (90% w/w) as trichloroisocyanuric acid |
| Active Ingredient — Algaecide | 7.5 g/kg as copper sulphate pentahydrate (equivalent to approx. 1.9 g/kg elemental copper) |
| Physical State | Solid (compressed tablet) |
| Appearance | White to off-white compressed tablet with a characteristic mild chlorine odour |
| Density (bulk tablet) | Approximately 1.0–1.2 g/cm³ |
| pH of Solution (1% w/v in water) | 2.7–3.3 (strongly acidic; working pool solution pH target: 7.2–7.6) |
| Solubility in Water (TCCA, 25°C) | Approximately 1.2 g/100 mL (slow-dissolving; by design for controlled release) |
| Cyanuric Acid (stabiliser) released per tablet | Approximately 57–60 g per 200 g tablet (as CYA upon hydrolysis) |
| UN Number | UN 2468 |
| ADG Class | Class 5.1 (Oxidising Agent) with subsidiary risk Class 6.1 (Toxic) and Class 8 (Corrosive) |
| Packing Group | II |
| Proper Shipping Name | Trichloroisocyanuric acid, dry |
Applications & Use Cases
- Outdoor residential swimming pool sanitation: Primary disinfection of backyard pools across Australian climatic conditions, where UV stabilisation from cyanuric acid (CYA) is essential to prevent rapid chlorine degradation.
- Outdoor commercial pool maintenance: Suitable for motels, caravan parks, body corporate pools, and holiday accommodation where supervised slow-release dosing is appropriate and daily monitoring is performed.
- Algae control: Combined chlorine and copper sulphate active ingredients provide dual-mode control of green, black, and mustard algae in pool and ornamental water bodies.
- Floating dispenser or skimmer basket dosing: Designed for continuous controlled-release application via standard floating dispensers or skimmer basket dispensers; suitable for pools with variable bather loads.
- Holiday and low-maintenance pool management: Slow-dissolving tablet formulation reduces dosing frequency, making it suitable for holiday homes or seasonal pools with reduced oversight.
- Maintenance dosing between shock treatments: Used as the routine chlorine source between periodic calcium hypochlorite or sodium hypochlorite shock (superchlorination) treatments.
- Spa pools and swim spas (with caution): May be used in larger-volume spa pools where water volume is sufficient to prevent rapid concentration build-up; requires careful monitoring of CYA and copper levels.
Dosing Rates & Guidelines
| Application | Dosing Rate | Units | Notes |
|---|---|---|---|
| Outdoor residential pool — initial/maintenance dose | 1 tablet per 20,000 | litres per tablet (200 g) | Delivers approximately 4.5 mg/L available chlorine at full dissolution in 20,000 L. Adjust based on actual free chlorine test results. Target: 1.0–3.0 mg/L free chlorine. |
| Outdoor residential pool — heavy bather load or high UV | 1 tablet per 15,000 | litres per tablet (200 g) | Increase rate during peak summer, heavy use periods, or following algae events. Monitor free chlorine and CYA weekly. |
| Outdoor commercial pool — maintenance | 1 tablet per 20,000 | litres per tablet (200 g) | Commercial operators must test free chlorine a minimum of twice daily (refer to state public health pool regulations). TCCA tablets are a maintenance product only; superchlorination should be conducted with unstabilised chlorine. |
| Target free chlorine residual (outdoor pool) | 1.0 – 3.0 | mg/L (ppm) | Per SPASA guidelines and state public health standards. Maintain pH 7.2–7.6 for optimum chlorine efficacy. At pH 7.4, approximately 50% of free chlorine is present as hypochlorous acid (HOCl), the active biocidal form. |
| Maximum recommended cyanuric acid (stabiliser) level | ≤ 100 | mg/L (ppm) | CYA accumulates with each tablet dissolved (~57–60 g CYA per 200 g TCCA tablet). Levels exceeding 100 mg/L significantly reduce chlorine efficacy (chlorine lock). At CYA > 100 mg/L, partial or full water replacement is required. SPASA recommends 30–50 mg/L CYA for optimal stabilisation. |
| Copper concentration (from copper sulphate) | 0.1 – 0.3 (target); ≤ 1.0 (maximum) | mg/L elemental copper | Copper accumulates in pool water over time. Monitor monthly. Levels exceeding 0.3 mg/L may cause staining of pool surfaces and bather hair discolouration. Levels exceeding 1.0 mg/L require dilution. Do not use in pools with UV sanitisers without confirming copper compatibility. |
| Dissolution rate (floating dispenser, 25°C, moderate flow) | Approximately 3–7 days per 200 g tablet | days per tablet | Dissolution rate is highly dependent on water temperature, flow rate through the dispenser, and dispenser aperture setting. Higher water temperatures accelerate dissolution. Adjust the dispenser opening accordingly. |
Dilution Instructions
These tablets are a controlled-release solid product intended for use via a floating dispenser or skimmer basket dosing device. They are not dissolved in a separate solution prior to pool addition under standard use. The following instructions apply to safe handling and deployment.
- Step 1 — Don appropriate PPE before handling: Nitrile or PVC chemical-resistant gloves, chemical splash goggles, and dust/mist respirator (minimum P1 filter rating). Avoid handling tablets with your bare hands. TCCA is a strong oxidiser and skin contact may cause irritation or chemical burns.
- Step 2 — Inspect the tablet: Do not use tablets that are cracked, wet, or show signs of reaction (discolouration, heat generation, or strong acrid odour beyond normal chlorine smell). Damaged tablets may dissolve unpredictably.
- Step 3 — Load into dispenser away from the pool: Place the tablet(s) into a floating dispenser or skimmer basket dispenser in a well-ventilated area. Do not place tablets directly into the skimmer basket without a purpose-built dispenser, as concentrated chlorine solution exiting the skimmer can damage pool equipment, heat exchangers, and pump seals.
- Step 4 — Set dispenser flow rate: Adjust the dispenser collar/aperture to control dissolution rate. Start on a low setting and test free chlorine after 24–48 hours; adjust as required to maintain 1.0–3.0 mg/L free chlorine.
- Step 5 — Never dissolve tablets in a bucket for direct addition: If emergency direct dissolution is required, always add the tablet to a clean bucket of pool water (never add water to the solid tablet in a confined container). Use a large volume of water relative to the tablet mass. Never mix with any other chemical in the same container. This method is not recommended for routine use.
- Step 6 — Test water parameters after each new tablet: Test free chlorine, total chlorine, pH, and cyanuric acid (CYA) levels. Adjust pH to 7.2–7.6 using sodium carbonate (pH Up) or sodium bisulfate (pH Down) as required. Low pH increases chlorine efficacy but accelerates equipment corrosion; high pH reduces efficacy.
- Step 7 — Monitor cyanuric acid accumulation: Each 200 g TCCA tablet releases approximately 57–60 g of cyanuric acid into pool water. Track cumulative CYA levels. Dilute pool water (partial drain and refill) when CYA exceeds 80–100 mg/L.
Chemical Compatibility
Compatible With (under correct conditions)
- Pool water (with correct pH buffering applied)
- Sodium carbonate (soda ash) — pH adjustment; add separately and never directly mix dry chemicals
- Sodium bisulfate — pH reduction; add separately to pool water, never mix dry chemicals together
- Calcium chloride — calcium hardness adjustment; compatible in dilute pool water solution; never mix dry
- Sodium bicarbonate — alkalinity adjustment; add separately to pool water
- Algaecides (non-oxidising, e.g. PolyQuat-based) — add separately; do not mix concentrated products
- Standard pool filtration media: sand, glass media, cartridge filters
Incompatible With — Do NOT Mix or Store Together
- Calcium hypochlorite (granular or tablet): Extremely hazardous. Mixing TCCA with calcium hypochlorite causes an immediate, violent exothermic reaction, releasing toxic chlorine gas (Clâ‚‚) and may result in fire or explosion. This is one of the most common causes of serious chemical incidents in the Australian pool industry. These products must never be stored in the same container, dispenser, or in close proximity without adequate separation.
- Sodium hypochlorite (liquid chlorine, bleach): Incompatible. Contact may generate heat and chlorine gas. Do not add liquid chlorine to a skimmer or dispenser containing TCCA residue.
- Lithium hypochlorite: Incompatible. Reaction hazard similar to calcium hypochlorite.
- Acids (concentrated): Contact with concentrated acids (hydrochloric, sulphuric, muriatic acid) causes violent decomposition and release of toxic chlorine gas. Dilute acids used for pH adjustment must be added to the pool water separately and at a different time.
- Ammonia and ammonium compounds: React to form explosive nitrogen trichloride (NCl₃). Do not combine.
- Flammable or combustible materials: As a strong oxidiser (ADG Class 5.1), contact with organic materials, fuels, oils, sawdust, and similar materials presents a serious fire and explosion risk.
- Hydrogen peroxide: Contact between TCCA and hydrogen peroxide (or peroxide-based pool oxidisers) is hazardous and may cause rapid decomposition, heat generation, and chlorine gas release.
- Other oxidising agents (potassium monopersulphate — MPS/non-chlorine shock): Do not mix directly. If using MPS shock treatments in the same pool, allow at least 24 hours between MPS addition and TCCA tablet deployment, and never combine in a dispenser.
- Reducer chemicals (sodium thiosulphate, sodium metabisulphite): Violent oxidation-reduction reaction may occur on direct contact with concentrated forms.
- Diatomaceous earth (DE) filter media: Prolonged contact of concentrated TCCA dissolving directly into a DE filter system may cause filter degradation; use standard floating dispensers to prevent concentrated contact.
| Weight | 0.2 kg |
|---|---|
| Dimensions | 10 × 6 × 6 cm |
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