What does it remove?
Water TechniX Black Spot Remover is designed to target stubborn and deeply embedded black spot algae. Unlike common algae, black spot forms strong roots within porous pool surfaces, making it difficult to eliminate with standard treatments. This powerful formula attacks the algae at its core, helping to prevent regrowth. In more severe cases, 2–3 treatments spread over 2–3 weeks may be necessary to completely eradicate the infestation.
How does the formula work?
Our slow dissolving, concentrated formula gradually releases high strength granular chlorine over 24 hours, ensuring prolonged exposure to the algae for more effective treatment. This sustained release breaks down the algae's tough outer layer and penetrates into the root system, helping to kill it completely and reduce the chance of it returning.
How should I apply it?
Application is simple, but for best results, it’s important to follow the correct method based on your pool surface:
- Pebblecrete, Concrete or Quartzon Pools: Apply the product directly onto the affected area with the pump running. Brushing the algae beforehand with a stainless steel pool brush will help remove its waxy protective layer and improve penetration.
- Fiberglass, Vinyl or Tiled Pools: While black spot algae does not typically grow on these surfaces, this product can still be used as a powerful chlorine boost to help sanitise and clear up resistant organic matter or algae blooms. For safe application, always pre dissolve the product in a large bucket of pool water before adding it directly in front of your return jets with the pump running. Avoid adding undissolved product directly to the surface as it may cause bleaching or surface damage.
What ongoing water conditions should be checked? Maintaining balanced water is essential for the treatment to work effectively and to prevent future outbreaks. We recommend:
- pH levels: Maintain between 7.2 and 7.4. Closer to 7.2 for optimal chlorine effectiveness.
- Chlorine levels: Keep chlorine within recommended range during treatment to support sanitisation.
- Filtration: Run the pump continuously for at least 24 hours during and after treatment for maximum circulation.
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Check metal levels before treatment: Elevated levels of metals in pool water may react with high strength chlorine treatments and cause dark staining. To minimise the risk of this, we recommend ensuring metal levels are low or treating the water with a metal remover prior to application.
How long does treatment take?
The Black Spot Remover starts working immediately upon application and continues to release active chlorine over a 24 hour circulation period. In severe cases, where algae is deeply rooted or widespread, a second or third application spaced 7 days apart may be required to fully eliminate the problem.
Can I use this in a fiberglass or vinyl pool? While black spot algae typically does not grow in fiberglass, vinyl, or tiled pools, this product can still serve as a powerful sanitiser to help combat other resistant algae or organic build ups. To use safely in these pools:
- Always pre dissolve the product in a large bucket of pool water.
- Add the solution near your return jets with the pump running.
- Avoid adding undissolved product directly to the pool surface to prevent potential bleaching.
Can I use this in a concrete or tiled pool?
Yes, add directly to affected spot with the pump running.
Dosing Multiple Chemicals or Need to Swim Soon?
We have a detailed Pool Chemical Wait Times and Chemical Interactions Guide that you can check here.
Water TechniX Black Spot Algae Remover – Powerful Algae Control for Pools
Water TechniX Black Spot Algae Remover is a premium, slow-dissolving, high-strength treatment designed to eliminate black spot algae and keep your pool crystal clear. Perfect for treating widespread or difficult-to-spot algae, this product helps you maintain a clean and healthy pool year-round.
💡 Did You Know Black spot algae's root cause is usually a lack of sanitisation (chlorine). If black spot keeps appearing, check that your chlorine levels are balanced (usually 2-4 ppm for residential pools). If your chlorine level is consistently under, your chlorinator, salt levels or salt cell may need assessing to ensure enough chlorine is being dosed.
Key Benefits:
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Slow-Dissolving Formula: Provides long-lasting algae control.
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Neutral pH with UV Blockout: Protects chlorine for extended effectiveness.
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High-Strength Di-Chlor Stabilised Shock: Ultra-concentrated high strength for maximum performance.
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Made in Australia: Premium quality backed by over 25 years of expertise.
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Cost-Effective: Save up to 50% compared to major pool brands.
In-Pool Black Spot Treatment:
How to Apply:
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Balance Your Water:
- Ensure pH is between 7.2 and 7.6.
- Ensure chlorine levels are appropriate for the treatment.
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Apply the Product:
- Add 400g per 10,000L of pool water. Pre dissolve in a bucket for fibreglass and vinyl pools. For blackspot on concrete, pebble, or tiled surfaces, apply directly to affected areas. Wait 24–36 hours, then scrub with a stainless steal pool brush. Ensure pH is 7.2–7.6 and chlorine is 1–3 ppm. Do not use in indoor pools, commercial spas, or floating dispensers. Full instructions included on the label.
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Circulate the Treatment:
- Run your pool pump and filter for several hours to ensure the product is evenly distributed.
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Brush the Pool:
- Scrub the walls and floor to loosen black spot algae and allow the remover to work effectively.
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Monitor the Results:
- Check your pool over the next few days.
- Severe cases may require multiple treatments, and you may need to shock the pool to maintain control of algae growth.
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Rebalance the Water:
- After the treatment, test and adjust pH and chlorine levels as necessary before swimming.
Post-Treatment Recommendations:
- After removing black spot algae, apply a preventative algaecide to prevent future outbreaks.
Product Details:
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Active Ingredient: 900g/kg Chlorine (as Trichloroisocyanuric Acid)
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APVMA Approval: #94205/141816
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Packaging: 1kg resealable jar for easy storage
- Made in Australia
Why Choose Water TechniX:
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Cost-Effective: Save up to 50% compared to traditional pool shop chemicals.
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Top Quality: Formulated to eliminate up to 4X more bacteria with low-residual ingredients.
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Support Local: Proudly made and tested in Australia, supporting Aussie businesses.
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Proven Performance: Rigorously tested for use on all pool types.
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Time-Saving: Maintain your pool in under a minute with easy, single-dose jars.
Always wear safety protection and follow the label instructions when handling pool chemicals.
⚠️ For fibreglass or vinyl pools: Always dissolve in a bucket first, then pour the mixture directly above the pool returns while the pump is running. Never add undissolved product to fibreglass or vinyl pools to prevent surface damage.
Problem: Granulated chlorine can clump or dissolve slowly when mixed with too little water or in cold conditions, making it less effective.
Solution: Always mix with plenty of water (preferably warm) as this helps it dissolve faster. For the best results, pour directly into the pool if surface bleaching isn’t a concern.
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