It Spread All Winter. You're About to See How Far.
Spring's here and the cover's coming off. Black spot embedded deeper all winter while your pool sat covered. Kill it in under 24 hours before you see how bad it got.
Covers are coming off across Australia right now. What's underneath is worse than when you closed up.
Water TechniX Black Spot Remover 1kg
Choose your pack
Black spot algae etches into pool surfaces permanently if left untreated. Resurfacing costs $3,000 to $8,000. Treating it now is the only cheap option.
★★★★★ 1,240+ Australians
killed black spot before it took over their pool
- Kills Black Spots Fast: Visible results in under 24 hours. Spots turn grey, then disappear.
- Surface Safe: Concrete, pebblecrete, quartzon, fibreglass, vinyl and tile. Use skimmer method for softer surfaces.
- Concentrated Power: 900g/kg Trichloroisocyanuric Acid. Professional-grade slow release formula.
- Prevents Regrowth: Kills the root to stop it coming back season after season.
- Dosage: 1kg treats up to 25,000L. For heavy infestations, a second application is recommended.
Why This Works When Others Don't
Quick Answers
Most pool owners see black spots turning grey within 24 hours. For heavy infestations a second application a week later is recommended. With 4 jars you have enough for follow-up treatments.
Yes. For fibreglass, vinyl, quartzon and tiled pools, add it via the skimmer basket rather than direct application to avoid bleaching. Concrete and pebblecrete can be spot-treated directly.
Wait at least 48 hours and confirm chlorine is back to 2 to 4 ppm and pH is 7.2 to 7.6 before swimming.
No. Black spot spent all winter embedding deeper into your pool surface. Every week you wait now makes it harder to kill. Treat it in the next week or two and it's gone before first swim rather than being a bigger job once the pool is in use.
The Black Spot Nightmare
You've scrubbed, shocked, and tried every DIY trick. Yet those stubborn, deeply rooted black spots keep coming back and after a full winter of spreading, they're about to be worse than ever.
Endless Scrubbing
You scrub every spring and it never lasts. The spots always come back by December.
Wasted Money
Regular algaecides simply don't work on black spot algae. It has a protective waxy layer.
Permanent Damage
Left untreated, black spot algae etches into and ruins pool surfaces permanently.
Winter Made It Worse
Pools sat ignored all winter. Now the cover's off and black spot is deeper than ever.
Spring Reality Check
You Ignored It. Now You Get to See the Damage.
Most pool owners didn't think about black spot all autumn and winter. Now covers are coming off and that's exactly why it's so destructive. While your pool sat unused, algae wasn't resting. It burrowed deeper into the surface, spread its root system, and made itself harder to kill. What would have taken one treatment before winter could take two or three now.
Serious Chemistry. Here's How to Use It Safely.
Trichloroisocyanuric Acid is a professional-grade active ingredient. That's what makes it work when nothing else does. Follow these steps and you'll have no issues.
Wait 48 hours before swimming
The formula super-chlorinates the water to kill algae at the root. Before getting back in, check that chlorine is between 2 and 4 ppm and pH sits between 7.2 and 7.6.
Fibreglass, vinyl, quartzon or tiled pool? Apply via the skimmer basket
Direct application on softer pool surfaces can cause localised bleaching. Add the granules to your skimmer basket instead. The same high-concentration chlorine circulates and kills the algae without touching the surface directly.
Concrete or pebblecrete pool? Spot treat directly on the affected areas
Hard surfaces handle direct contact without bleaching. Apply granules directly onto the black spot patches. Brush first to break the algae's waxy outer layer, then apply.
How Black Spot Remover Eliminates Algae
Water TechniX Black Spot Remover uses a slow-dissolving, concentrated formula. It gradually releases high-strength granular chlorine (Active: Trichloroisocyanuric Acid 900g/kg) over 24 hours, breaking down the algae's tough outer layer and penetrating its root system to kill it completely.
Concentrated Power
High-strength formula targets algae directly where other products can't reach.
Slow Release Action
Gradually releases sanitiser over 24 hours for prolonged, sustained algae attack.
Penetrates and Destroys
Breaks down the protective waxy layers and kills algae at its core and roots.
Prevents Regrowth
Eliminates the source so it won't come back harder next season.
Simple Steps to a Spotless Pool
Treat now while the cover's off and before first swim. Spring is when black spot fights back hardest.
Application Instructions
Brush Affected Areas
Vigorously brush the black spots with a stainless steel brush (for concrete/pebble) or a nylon brush (for vinyl/fibreglass) to break the algae's protective waxy layer.
Apply the Product
For Concrete and Pebblecrete Pools:
Apply the product directly onto the affected areas (spot treat).
For Vinyl, Fibreglass, Quartzon and Tiled Pools:
Apply the product directly into the skimmer basket. Direct application on softer surfaces can cause bleaching.
Circulate, Then Brush and Vacuum
Run your pool pump for at least 24 hours. After 24 to 48 hours, brush away dead algae (it typically turns grey/white) and vacuum the waste to waste or filter.
Important Safety Note
Do not swim for at least 48 hours after treatment. This product super-chlorinates the water, which may cause skin and eye irritation.
Before re-entering the pool, ensure your water is balanced:
- ✓ Chlorine: 2 to 4 ppm (Summer) | 2 to 3 ppm (Winter)
- ✓ pH: 7.2 to 7.6
Always read and follow the full product label instructions and safety precautions.
Oxi Shock 500g: The Perfect Follow-Up
After the Black Spot Remover does the heavy lifting, use Oxi Shock to clean up the mess. It oxidises the dead algae and organic waste, softens the water, and removes that itchy skin feeling.
Dosage: 1 x 500g tub treats up to 40,000L.
- Removes Dead Algae: Acts as the cleanup step for your pool after treatment.
- Eliminates Itch: Removes chloramines that cause itchy skin and red eyes.
- Lightning Fast: Swim-ready in just 15 minutes.
What Our Customers Are Saying
Works on every pool surface
More from our customers
"Honestly, I was about to give up. My pebblecrete pool was covered in black spots that just wouldn't budge. Gave this stuff a go and wow, it actually worked! The spots are completely gone."
"What a lifesaver! I was so over spending my weekends scrubbing. This stuff saved me so much time. My pool seriously has never looked this good. Highly recommend it!"
"Was getting so frustrated with stubborn black spots. I just followed the instructions and within a week the patches were gone. Pool is looking crystal clear again."
First Swim's Coming.
Deal With It Now.
Spring is here and first swim is weeks away. Black spot spread silently all winter. 4 jars for $179.97 covers your whole pool with spare for follow-up treatments. Free shipping included.