At close-down once water temperature drops below 12 C and you have shocked to 10 ppm chlorine.

20 ml per m³ as a one-shot. For a 40 m³ pool that is 800 ml.

Can I use this instead of separate chemicals?

Yes. Replaces winter algaecide, scale inhibitor and pH buffer in one product.

Do I still need pipe antifreeze?

Yes. Winteriser protects water; antifreeze protects pipework. Both are needed.

Is this just polyquat?

No. Combined polyquat + scale inhibitor + pH buffer. Dedicated winter algaecide is polyquat alone.

What are the active ingredients?

Polyquat algaecide, phosphonate scale inhibitor, carbonate pH buffer; combined 30-40% w/w.

Single dose, single mix-down, single application; standard practice in commercial pool closure.

Will it stain plaster?

No. Phosphonate is colourless; polyquat is non-staining; buffer is salt.

Brush, shock, vacuum dead algae to waste; rebalance chemistry.

Apply tile cleaner; descale heater per manufacturer.

Winteriser vs winter algaecide?

Winteriser is the all-in-one closure pack; winter algaecide is polyquat or copper alone. Winteriser saves money on combined dose.

Winteriser vs pipe antifreeze?

Different jobs. Winteriser is for water chemistry; antifreeze prevents frozen pipework. Always use both.

Pool Long-Life Winteriser - Off-Season Algaecide & Stabiliser

Name: Pool Long-Life Winteriser - Off-Season Algaecide & Stabiliser
Brand: ClearSpa
SKU: pw-1
Availability: InStock
Rating: 5.0 (6 reviews)

Long-life pool winteriser concentrate that prevents algae and stops scale through 4-6 months of pool closure. One dose at close-down keeps water clear and balanced under the cover.

Stops algae growth through 4-6 months of pool closure.
Inhibits calcium scale forming on cold water lines.
Buffers pH against winter drift.
Pairs with pipe antifreeze to give full winter protection.
Cuts spring opening time and chemical demand.