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 for pH to lower in a pool?

• <div><p>Once you use a pH decreaser, you can expect the pH to adjust in two to four hours. If you use a strong chemical like muriatic acid, it could take as little as an hour. Either way, it’s best to wait for a full turnover cycle before retesting. You want to make sure the chemical is completely dissolved and evenly distributed or you won’t have a stable pH level.</p></div>

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TRUSTED BY MANHATTAN, MT HOMEOWNERS

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

*The Angi rating for Above Ground Pool Installation companies in Manhattan, 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 Manhattan, 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 June 18, 2026

Reviewed in June 2026
They were exactly as advertised, their prep work was excellent and they went over and above to make the job the high light the neighborhood. I’ll hire them again in about 15 years
CertaPro of Southern Montana
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Reviewed in May 2026
They cleaned out two beds in front of the house , put down new fabric, planted roses, and installed river rock. Looks good!
The Grounds Guys of Bozeman
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Reviewed in January 2025
Oasis Landscaping went above and beyond for our ambulance service by responding to our last-minute call for snow removal. They cleared our parking lot quickly and efficiently, ensuring we could promptly respond to emergency calls. Their professionalism and reliability were outstanding?highly...
Oasis Landscape & Excavation LLC
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Reviewed in April 2024
Allen Garcia cleared out four buildings and a large backyard of old equipment, brush, lumber and more. Allen worked above and beyond and through it all maintained a pleasant, professional attitude. I highly recommend Allen Garcia of Bozeman Junk Removal.
Garcia Hauling, LLC
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Reviewed in August 2023
This company was extremely professional. The install was fast and efficient. They hauled away the old furnace boxes and anything related to the job.
Home Front Heating & Cooling LLC
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Reviewed in February 2023
Ryan did some tile work, trim carpentry work and wood flooring installation as well.
Oliver Construction
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Reviewed in December 2022
Mike, Tony and crew did just what we talked about at the beginning. They did it while having to move a lot of stuff around in the garage throughout the project, and left it all clean and able to park our cars in the garage each night - a real benefit. They sheet rocked, taped and painted the...
Paragon Montana
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Reviewed in October 2022
For the past four years Brian and his crew has did a Spring Clean up and de-thatching of our lawn. Each year has been as good as the last. Common Ground takes pride in their work and it's greatly appreciated on our part.
Common Ground Landscape Maintenance
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Reviewed in March 2022
Installation was great. Very timely and company very professional.
Renewal by Andersen of Montana
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Reviewed in February 2022
Peter and Josiah do it all. On a recent project, they fine-tuned the driveway, completely recontoured a sloped site, installed a specialty ground-to-air heat transfer system, built trails, installed culverts and waterlines among other things. They are very conscientious and focused on getting...
Rocky Mountain Construction
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Find Above ground pool installation pros in Manhattan

Above Ground Swimming Pool or Accessories - Repair or Service

Serving Manhattan, 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(

5,688

)

Above Ground Swimming Pool or Accessories - Repair or Service

Serving Manhattan, 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 questions, answered by experts

Spools can come as small as 10 x 6 feet, so they don’t take up a lot of room in your yard. You’ll want to plan for pool decking, fencing, and other features that may take additional space, but for the most part, a spool’s small footprint makes it a great choice when you don’t have much yard space to spare.

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.

In-ground pools lose water naturally due to wind, heat, and humidity. They also lose water from the kiddos' cannonball competitions. But be mindful of the water level. If it drops too low and the pump draws in air instead of water, it will likely be damaged and require repair or replacement.

Once you use a pH decreaser, you can expect the pH to adjust in two to four hours. If you use a strong chemical like muriatic acid, it could take as little as an hour. Either way, it’s best to wait for a full turnover cycle before retesting. You want to make sure the chemical is completely dissolved and evenly distributed or you won’t have a stable pH level.

With a regular pool, the water is contained by visible walls that are higher than the water level. An infinity pool has one or more walls that are right at the waterline so they're not truly visible. For an invisible look, the lower wall is often made of glass or clear acrylic. The water laps over the lower edge and into a catch basin below where it gets pumped back into the pool.

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

From average costs to expert advice, get all the answers you need to get your job done.

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