Pureblue Blackspot & Winteriser Algaecide

Pureblue Concentrated Blackspot & Winteriser Algaecide

Black spot algae is one of the toughest pool problems to beat — it clings to surfaces, resists standard chlorine treatments, and keeps coming back if not treated properly. Pureblue's Concentrated Blackspot & Winteriser Algaecide combines an organo-copper complex with benzalkonium chloride to kill all algae types at the root, including the stubborn black spot strains that other products miss.

Active Constituents

• 50g/L Organo-Copper Complex
• 100g/L Benzalkonium Chloride

Key Features

• Kills all algae types — green, mustard, black spot, and pink algae
• Heavy-duty concentrated formula — effective at low doses
• Effective across a wide pH range — best results at pH 7.0–7.2
• Safe for all pool surfaces — fibreglass, vinyl, and concrete
• UV-stabilised — long-lasting protection through Australian summers
• Doubles as a winteriser — protects your pool during the off-season

Important Notes

• Not suitable for pools using ionisers or Nature's 2 systems
• For best results, maintain pH between 7.0–7.2 before dosing

Frequently Asked Questions

What types of algae does this product kill?
Pureblue Blackspot & Winteriser Algaecide kills all common pool algae types — green, mustard (yellow), black spot, and pink algae. It is particularly effective against black spot algae, which is resistant to standard chlorine treatments.

Can I use this in a fibreglass or vinyl pool?
Yes — the organo-copper complex formula is safe for use in fibreglass, vinyl, and concrete pools.

Can I use this with an ioniser or Nature's 2 system?
No — this product should not be used in pools that use ionisers or Nature's 2 mineral systems, as the copper content can interact with these systems.

When is the best time to use a winteriser algaecide?
Apply at the end of the swimming season before closing your pool for winter. This prevents algae from establishing during the colder months when the pool is not being actively maintained.

What pH should my pool be before dosing?
For best results, adjust your pool pH to between 7.0 and 7.2 before applying this algaecide.