How long can water sit in a pool without chlorine?

• <div><p>You should add chlorine within 48 hours of <a href="https://www.angi.com/articles/cost-fill-pool-water.htm">filling your pool with water</a>. In just 24 hours, bacteria and algae will begin to grow and contaminate your water. After that point, you’ll need to shock the water with high levels of chlorine, and you’ll likely need to do additional vacuuming to get the pool clean. It’s important to check your chlorine levels two to three times a week and add more chlorine as needed to maintain a healthy level.</p></div>

How long does it take to fill a pool with water?

• <div><p>It can take anywhere from 12 to 24 hours to <a href="https://www.angi.com/articles/how-long-does-it-take-to-fill-a-pool.htm">fill the average pool with water</a>—and that’s if you use a couple of garden hoses. A water delivery service can fill your pool in one to three hours. Some services even pre-treat the water so it’s swim-ready as soon as it’s filled. </p></div>

Top-rated above ground pool installation pros.

Best above ground pool installation pros near Darby, MT

Q: What type of sand does a pool filter use?

• <div><p>The type of sand you need for your sand filter depends on the manufacturer&rsquo;s instructions, but you&rsquo;ll need to use sand specifically for pool filters. Silica sand is a wallet-friendly, common choice that&rsquo;s relatively easy to replace. You&rsquo;ll choose between various grades of sand and different-sized sand grains. </p></div>

Q: Why are pool lights so expensive?

• <div><p>Pool light replacements are often more expensive compared to other pool parts, like pump motors, or standard light bulbs for indoor use. The reason for the higher cost is that pool lights are specially designed and made with parts meant to keep swimmers safe. The light fixture and surrounding parts protecting the bulb must be waterproof, tightly sealed, and resistant to extreme temperatures.</p></div>

Q: Can you swim in a pool with high calcium hardness?

• <div><p>Yes, swimming in a pool with high calcium hardness is considered safe as long as you have sufficient chlorine and pH levels to keep bacteria growth under control. The main issue with high calcium hardness is that it damages your pool through rust and corrosion. However, if your water is hard enough to corrode your pool, you might want to consider finding methods to <a href="https://www.angi.com/articles/how-keep-your-drinking-water-safe.htm">make it safe for drinking at home</a>.</p></div>

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Verified Reviews for Above Ground Pool Installation pros in Darby, MT

*The Angi rating for Above Ground Pool Installation companies in Darby, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Above Ground Pool Installation needs.

*The HomeAdvisor rating for Above Ground Pool Installation companies in Darby, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Above Ground Pool Installation needs.

Last update on January 12, 2026

Reviewed in January 2026
Hello! I am a contractor in the Bitterroot Valley specializing in residential framing and exterior timber work. I have worked with Lasting Decks for a while now, and have been impressed with their quality and professional workmanship. Their friendly and knowledgeable personnel have been very...
Lasting Decks LLC
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Reviewed in August 2024
These guys are great and I will never use anyone else for roofing needs. I have dealt with a lot of different contractors over the years but hands-down Double L Roofing is the best. Very professional, superb quality, great price, courteous, reliable and polite. Thank you Double L Roofing team!
Double L Roofing, Inc.
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Reviewed in June 2024
Luke maintains the cleanest and most organized job site I've ever seen! Hardworking, honest, go-getter who does meticulous work.
Built Right Construction
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Reviewed in May 2024
Walter was very thorough, explained what he found. I would recommend him for your home inspections.
WTB General Contractor & Home Inspector LLC
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Reviewed in June 2023
The team was punctual, professional and friendly. They not only fixed the problem, but took photos of the finished project. They communicated the expectations and procedure through the whole process. We will definitely use for our next project. They kept the work area clean as they went.
Mountain Air Roofing And Coating, LLC
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Reviewed in April 2022
Lotus Painted performed better than expected, with a focus on detail that was beyond my requirements. I am very pleased.
Lotus Painting LLC
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Reviewed in October 2021
Great communication from start to finish. Move was from Oregon to Hamilton MT. Tanner and his crew did a great job of loading. Sergio was our truck driver and managed the unloading. He actually unloaded almost half of the truck load as he waited for the local labor to arrive and help with the...
PDX Movers, LLC
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Reviewed in September 2017
Trevor was always on time,did over and above what was first discussed. Price for the work was very reasonable and Quality was fabulous. Trevor will be my first call on my next project.
TNG Excavation, LLC
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Reviewed in February 2016
Prompt, courteous, and most importantly Kevin takes great pride in his work. A true professional.
Porter's Solar Panel Cleaning, Etc.
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Reviewed in April 2014
This has been the worst business experience we have ever had. Owners have been deceptive, dishonest, and unscrupulous. Charges have been inflated several times. "Overhead and profit" were added to the final bill, which were not on previous invoices.Workers attempted to install flooring without...
All Valley Flooring
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Top-Rated Above ground pool installation pros in Darby - Updated Nov 2026

Above Ground Swimming Pool or Accessories - Repair or Service

Serving Darby, MT and surrounding areas

In business since 2008

Emergency services offered

Credit card accepted

"The tech was very knowledgeable and went above and beyond to satisfy us. Our faucet was broken would not attach to the sink as the copper seal broke to the water lines."

Recommended by81%of homeowners

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American Home Shield – Home Warranty

3.5(

5,689

)

Above Ground Swimming Pool or Accessories - Repair or Service

Serving Darby, MT and surrounding areas

In business since 1971

Credit card accepted

"Called AHS....who sent service request to AAA Flexible Pipe. Adam came out quickly and installed new pump just before HEAVY rains hit...Fast and efficient service from AHS and AAA FLEXIBLE PIPE CLEANING."

Recommended by65%of homeowners

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Install Above Ground Pools FAQs, answered by experts

You should add chlorine within 48 hours of filling your pool with water. In just 24 hours, bacteria and algae will begin to grow and contaminate your water. After that point, you’ll need to shock the water with high levels of chlorine, and you’ll likely need to do additional vacuuming to get the pool clean. It’s important to check your chlorine levels two to three times a week and add more chlorine as needed to maintain a healthy level.

The type of sand you need for your sand filter depends on the manufacturer’s instructions, but you’ll need to use sand specifically for pool filters. Silica sand is a wallet-friendly, common choice that’s relatively easy to replace. You’ll choose between various grades of sand and different-sized sand grains.

It can take anywhere from 12 to 24 hours to fill the average pool with water—and that’s if you use a couple of garden hoses. A water delivery service can fill your pool in one to three hours. Some services even pre-treat the water so it’s swim-ready as soon as it’s filled.

Pool light replacements are often more expensive compared to other pool parts, like pump motors, or standard light bulbs for indoor use. The reason for the higher cost is that pool lights are specially designed and made with parts meant to keep swimmers safe. The light fixture and surrounding parts protecting the bulb must be waterproof, tightly sealed, and resistant to extreme temperatures.

Yes, swimming in a pool with high calcium hardness is considered safe as long as you have sufficient chlorine and pH levels to keep bacteria growth under control. The main issue with high calcium hardness is that it damages your pool through rust and corrosion. However, if your water is hard enough to corrode your pool, you might want to consider finding methods to make it safe for drinking at home.

The Darby, MT homeowners’ guide to above ground pool installation services

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