Viva Blu Stabilised Trichlor Tablets 25kg (200g tabs)

Technical Reference

Technical Specifications

Applications & Use Cases

• Residential swimming pool sanitation: Primary disinfectant for backyard pools via floating dispensers or skimmer basket placement; suited to pools of 20,000–80,000 L.
• Commercial swimming pool and spa sanitation: Used in inline erosion feeders for public pools, hotel pools, aquatic centres, and resort facilities across Australia; compliance with AS/NZS 1838 and state health department pool water quality guidelines.
• Portable and temporary water features: Inflatable pools, hydrotherapy pools, portable spa pools, and water play park features requiring controlled, slow-release chlorination.
• Irrigation system shock and line dosing: Biofilm and algae control in drip and sprinkler irrigation lines where cyanuric acid stabilisation is acceptable.
• Industrial cooling towers: Intermittent or supplemental biocidal dosing for Legionella risk management in open recirculating cooling water systems; used in conjunction with a broader water treatment programme per AS/NZS 3666.
• Decorative water features and fountains: Algae and microbial control in non-potable ornamental water bodies.
• Aquaculture holding facility sanitation: Equipment disinfection and facility wash-down (not for direct dosing into aquaculture water without specific regulatory clearance).
• Emergency water storage tank disinfection: Shock dosing of non-potable storage tanks and water carts (not for use in drinking water systems — TCCA is not approved under AS/NZS 4020 for potable water contact).

Dosing Rates & Guidelines

Cyanuric Acid (Stabiliser) Build-Up — Critical Note: Each 200 g tablet contributes approximately 114 g of cyanuric acid (CYA) upon full dissolution. Cyanuric acid accumulates in pool water and is not removed by normal chlorination. Target CYA level: 30–50 mg/L for outdoor pools; maximum recommended level: 100 mg/L. Above 100 mg/L, chlorine efficacy is significantly reduced (chlorine lock). If CYA exceeds 100 mg/L, partial dilution (drain and refill) is the only practical corrective action. Test CYA monthly at a minimum.

Dilution Instructions

Trichlor 200 g tablets are designed to be used undissolved in erosion feeders, floating dispensers, or skimmer baskets — they should not be dissolved and dosed as a liquid solution in normal pool applications. However, when preparing a stock solution for specialised dosing equipment or equipment pre-soaking, the following procedure applies.

• Equipment required: Chemical-resistant polyethylene (HDPE) or polypropylene container; accurate measuring scales; protective PPE (see Safety & Handling section); dedicated chemical-measuring scoop; clean potable water at ambient temperature (15–25°C).
• Step 1 — PPE first: Before handling any tablets, don nitrile or neoprene gloves (minimum 0.4 mm thickness), chemical splash goggles, and a chemical-resistant apron. Ensure adequate ventilation — work outdoors or under forced exhaust ventilation. A P2 half-face respirator is recommended when handling large quantities or when dust is likely.
• Step 2 — Prepare the container: Confirm the container is clean, dry, and free of any residues from incompatible chemicals (especially ammonia compounds, acids, other chlorine products, or oxidisable materials). Never use a metal container.
• Step 3 — Add water first: Measure and add the required volume of clean, cold water to the container before adding the tablets. Never add water to tablets — this can cause a rapid, exothermic localised reaction and chlorine gas release.
• Step 4 — Add tablets slowly: Place tablets individually into the water. Do not crush tablets to accelerate dissolution — this is a safety hazard. Allow tablets to dissolve naturally with gentle agitation. One 200 g tablet in 10 litres of water will produce a solution of approximately 9,000 mg/L available chlorine — this is a concentrated stock solution requiring significant further dilution before use.
• Step 5 — Allow full dissolution: At 20°C, full dissolution of one tablet in 10 L of water takes approximately 30–60 minutes with occasional stirring. Dissolution time increases at lower temperatures.
• Step 6 — pH check: A 1% solution has a pH of approximately 2.7–3.0. Do not handle or apply without confirming this acidic nature. When dosed to pool water, pH will drop — compensate with sodium carbonate (soda ash) as required to maintain pool pH at 7.2–7.6.
• Step 7 — Apply immediately: Do not store prepared solutions. Apply to the target water body promptly. Dispose of any unused solution by further dilution to pool water or as directed by your local environmental authority.
• Step 8 — Clean up: Rinse all equipment thoroughly with clean water after use. Wash hands and exposed skin thoroughly with soap and water after removing PPE.

Chemical Compatibility

Trichloroisocyanuric acid is a powerful oxidising agent. Incorrect mixing or storage near incompatible chemicals can result in fire, explosion, release of toxic chlorine gas, or violent decomposition. Read this section carefully before use or storage.

Compatible With (in the pool water treatment context)

• Sodium carbonate (soda ash) — used to raise pH; must be added to pool water separately, not mixed directly with TCCA tablets
• Sodium bicarbonate — used to raise alkalinity; add to pool water separately
• Calcium chloride — used to raise calcium hardness; add to pool water separately and at a different time
• Cyanuric acid (stabiliser) — compatible in solution; however, TCCA already releases CYA on dissolution, so supplemental stabiliser is rarely needed
• Algaecides (quaternary ammonium or polyquat-based) — generally compatible in dilute pool water conditions; not to be pre-mixed in concentrated form
• Polyethylene (HDPE), polypropylene, and PVC containers and fittings — chemically resistant and suitable for storage and handling

Incompatible With — Do NOT Mix or Store Together

• Calcium hypochlorite (pool shock / HTH / granular chlorine): Mixing TCCA with calcium hypochlorite is an extremely hazardous combination that can cause spontaneous ignition, fire, explosion, and release of toxic chlorine gas. These two products must NEVER be mixed, stored in contact with each other, or placed in the same chemical container. Maintain a minimum 3-metre separation in storage.
• Sodium hypochlorite (liquid chlorine/bleach): Direct mixing with concentrated sodium hypochlorite solution is incompatible and can result in chlorine gas generation. Do not add to the pool water simultaneously at the same dosing point.
• Ammonia, ammonium compounds, and nitrogenous fertilisers: Reacts to form explosive nitrogen trichloride (NCl₃). Strictly segregate in storage and use.
• Acids (hydrochloric, sulfuric, muriatic acid)