I'm not sure why this isn't shipped to ca, is it sold in stores in ca?

Yes u can purchase in California

Would you have to add this BEFORE lowering the water level? Otherwise, how would you be able to run the filter to circulate product, as instructed??

I always add it after water is lowered, just pour it around pool and it worked fine for us

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In The Swim Winter Algaecide for Above Ground and Inground Pools - 1 Quart

In The Swim Winter Algaecide for Above Ground and Inground Pools - 1 Quart

Product ID: 39003756

Details

Brand
In The Swim
Item Form
Liquid
Item Weight
2.6 pounds
Product Benefits
Controls Algae
UPC
758293053424

🧊Active in freezing temps

❄️Winter-long algae defense

🛡️Non-staining, surface safe

€ 79.66

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In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Keep your pool flawless through winter—because spring deserves a splash, not a scrub!

NON FOAMING FORMULA - Protects without staining or bleaching, maintaining your pool’s perfect balance.
STRESS FREE OFF SEASON - Lock in crystal-clear water and enjoy peace of mind until swim season returns.
EFFORTLESS SPRING START - Skip costly cleanups and shock treatments with one simple pre-winter application.
FREEZE PROOF ALGAE SHIELD - Keeps your pool pristine all winter, no matter how cold it gets.
UNIVERSAL POOL COMPATIBILITY - Safe for vinyl, plaster, fiberglass, and all filtration systems—no damage, no fuss.

In The Swim Winter Algaecide is a powerful, cold-weather pool treatment designed to prevent algae growth throughout the winter months. Its unique formula remains effective under ice and snow, protecting all pool surfaces without staining or foaming. One quart provides long-lasting defense, simplifying spring pool opening and ensuring crystal-clear water when you’re ready to swim again.

Specifications

ASIN	B002WKQ0PU
Best Sellers Rank	#8,106 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #22 in Swimming Pool Algaecides
Brand Name	In The Swim
Customer Reviews	4.7 4.7 out of 5 stars (860)
Item Form	Liquid
Item Weight	2.6 pounds
Manufacturer	In The Swim Discount Pool Supplies
Manufacturer Part Number	C050001012AE
Model Number	C050001012AE
Number of Items	1
Number of Packs	1
Package Size Name	1 Quart
Product Benefits	Controls Algae
UPC	758293053424
Unit Count	32 Fluid Ounces

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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I loved the variety of products available. Will definitely shop again.

2 months ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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€ 79.66

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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