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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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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.

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Download SDS sheets for HASA products.


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Achieve balanced chemistry easily.

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


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For water chemistry & professional pool management knowledge.


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HASA Blog

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

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 some technicians, shocking a pool means adding liquid pool shock to clear visible algae. Others use...

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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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7 min read

Solving For Combined Available Chlorine in Pools

When you walk past a pool and catch that strong “chlorine smell,” your first thought might be that there’s too much chlorine in the water. But here’s...

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3 min read

The 2026 Early Buy Program Smart Guide

The 2026 Early Buy Program Smart Guide

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Summertime party at the swimming pool with friends

2 min read

Use This Pool Care Checklist for a Perfect Pool Party

Pool Party Reality Check: The Water Has to Be Ready Before the People Are There’s nothing like hosting a pool party — laughter, music, and people...

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Pool technician uses a skimmer to rake up leaves from the water

2 min read

Here’s Why Experts Should Handle Your Pool Care

Owning a Pool is Not Just a Vibe — It’s a Responsibility With Chlorine Attached A swimming pool turns your backyard into a private resort — a place...

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