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Pool Professionals
Professional-grade products. Expert support. Built for your business.


Pool Owners
Eco-friendly, easy-to-use solutions to keep your pool clean and clear.


Industrial
Efficient treatment & supply. Performance-focused operations support.


Municipal
Reliable solutions & delivery. Sustainable treatment for public systems.


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Pool Products
HASA has the chlorine, algaecides, and sanitizers you need to keep your pool or spa clean and clear.

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Hot Tub Products
Shop our full line of Hi-Temp spa care products, including Eco-Safe Clarifiers and pH Increasers.

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Ancillary Products
Our eco-friendly water treatments are science-backed and purposefully focused.

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Mini-Bulk Program
We deliver a premium 12.5% sodium hypochlorite solution for sanitizing commercial pools and large-scale water systems.

Blog
Learn from water chemistry experts.


Videos
Browse instructional how-to videos.


Safety Data Sheets
Download SDS sheets for HASA products.


Pool Chemical Calculator
Achieve balanced chemistry easily.

Liquid Chlorine For Pools
A service professional’s guide that's been made simple.


Orenda Academy
For water chemistry & professional pool management knowledge.


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Learn about HASA's commitment via the returnable packaging model.

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HASA Blog

Education that results in clean, clear and safe water for all.

Teenage girl rubbing eyes in swimming pool from irritation.

3 min read

The Case of the Itchy Eyes

CSI: Chlorine Scene Investigation - The Case of the Itchy Eyes

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Flowers float on blue water in the swimming pool

5 min read

Understanding and Managing Pollen in Swimming Pools

Most people likely associate pollen with springtime sneezing, yellow coatings on cars, or the birds and the bees. But for pool owners and...

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Male Pool Service Pro, removing blue pool cover off of exterior community swimming pool.

5 min read

How to Maintain a Pool for Summer | Tips to Be Prepared

Are You Ready? The official start of summer may be Memorial Day weekend; however, the start of pool season can be as unpredictable as the weather....

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Red Haired Woman taking in the sun while leaning on the pool edge of an outdoor swimming pool

2 min read

The Case of the Chlorine Smell

Chlorine Confidential: The Case of CAC, the chlorine smell

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HASA Non-Deposit Product Bottle next to box, poolside in a backyard

6 min read

Understanding Liquid Pool Shock and Shocking a Pool | HASA

What Is Liquid Pool Shock and "Shocking" a Pool? In the pool service industry, few terms are used as loosely—and as inconsistently—as “shock.” For...

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Woman relaxing on a colorful inflatable pool float in clear blue water, wearing a sun hat and blue swimsuit, viewed from above with wide open water space.

5 min read

How to Open a Pool for the Season | Pool Startup Guide

Pool Season 2026 Is Almost Here: How to Open a Pool If your unofficial start of summer is Memorial Day weekend, that means the kickoff of pool season...

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Close-up image of a person using the Orenda mobile app by the pool

8 min read

What Is the LSI in Pool Water?

In the 1930s, Dr. Wilfred F. Langelier introduced something that reshaped how we understand water balance. It's called the Langelier Saturation...

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6 min read

Pool Chemical Safety: Proper Handling, Storage & Transport

When it comes to pool chemical safety, there’s no room for shortcuts. Whether you’re a seasoned pool service pro or someone managing a community or...

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8 min read

How Pool Care Professionals Solve Problems Like Detectives

When most people picture a pool service visit, they imagine a quick skim, a chemical top-off, and a wave goodbye. But anyone who’s watched real pool...

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5 min read

Why Is My Pool Green? How to Clean and Prevent Algae Naturally

How to Prevent Algae Without Algaecides Few things are more frustrating than watching your pool water shift from clear blue to murky green. The...

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