--- title: The Pool Shark H2O Commercial Pool Chemistry Blog (2) description: Learn how to use the Pool Shark H2O pool log book app to keep your commercial pool clean, healthy and profitable! (2) --- 855-742-7542 - - - [Login](https://app.poolsharkh2o.com) [![Pool Shark H2O - Chemical Recording and Pool Maintenance](https://blog.poolsharkh2o.com/hs-fs/hubfs/raw_assets/public/PoolSharkH2O_December2020/images/poolSharkPLogo-130x100.png?width=200&height=225&name=poolSharkPLogo-130x100.png "Pool Shark H2O - Chemical Recording and Pool Maintenance")](https://poolsharkh2o.com/) - [Home](https://poolsharkh2o.com/) - [Pool Log Book](https://poolsharkh2o.com/pool-log-book/) - [Commercial Pool Software](https://poolsharkh2o.com/commercial-pool-management-log/) - [Corporate Solutions](https://poolsharkh2o.com/commercial-pool-management-log/corporate-solutions/) - [Features](https://poolsharkh2o.com/features/) - [Pricing](https://poolsharkh2o.com/pricing/) - [Contact](https://poolsharkh2o.com/contact/) - [Blog](https://blog.poolsharkh2o.com/) - [Search](https://blog.poolsharkh2o.com/search-blogs) - [Home](https://poolsharkh2o.com/) - [Pool Log Book](https://poolsharkh2o.com/pool-log-book/) - [Commercial Pool Software](https://poolsharkh2o.com/commercial-pool-management-log/) - [Corporate Solutions](https://poolsharkh2o.com/commercial-pool-management-log/corporate-solutions/) - [Features](https://poolsharkh2o.com/features/) - [Pricing](https://poolsharkh2o.com/pricing/) - [Contact](https://poolsharkh2o.com/contact/) - [Blog](https://blog.poolsharkh2o.com/) - [Login](https://app.poolsharkh2o.com/) # The Pool Shark H2O Commercial Pool Chemistry Blog News & Updates # Search the Pool Shark H2O Blogs Our blog library has an extensive amount of articles on common issues with pool water chemistry and the most common causes of these issues. Use the search below to find an article that may help resolve your pool question. This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. If you are not finding the answer to your question, feel free to email us at [support@poolsharkh2o.com](mailto:support@poolsharkh2o.com) and we can try to help. [![Free, vs Combined vs Total Chlorine - A Guide for Commercial or Public Pool Operators](https://blog.poolsharkh2o.com/hubfs/App%20and%20Product%20Images/App%20Chemistry%20Report.png)](https://blog.poolsharkh2o.com/free-vs-combined-vs-total-chlorine-commercial-public-pool-operators) # [Free, vs Combined vs Total Chlorine - A Guide for Commercial or Public Pool Operators](https://blog.poolsharkh2o.com/free-vs-combined-vs-total-chlorine-commercial-public-pool-operators) Oct 15, 2026 When performing chemical tests of pool water, one of the most important chemical levels to measure and make note of is chlorine. Chlorine is put in commercial or public pool water for the purpose of sanitation and is a vital chemical when it comes to keeping pools clean. Without proper chlorine levels in the pool water, pools can offer a bad or even unsafe user experience. [![Pool Operation Management](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/Successful%20Pool%20Operation%20Management.png)](https://blog.poolsharkh2o.com/pool-operation-management) # [Pool Operation Management](https://blog.poolsharkh2o.com/pool-operation-management) Oct 14, 2026 Pool maintenance plays a vital role in keeping pools in good operating condition and in compliance with health codes. Unfortunately, it can be quite a difficult task at times, requiring daily testing to check water chemical levels in the pool, and frequent adjustments so that the chemicals stay in the acceptable range. Particularly when using non-digital testing methods and data recording... [![What Water Quality Risks Are Most Common in Hydrotherapy Pools?](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/hydrotherapy%20pool%20maintenance.png)](https://blog.poolsharkh2o.com/hydrotherapy-pools) # [What Water Quality Risks Are Most Common in Hydrotherapy Pools?](https://blog.poolsharkh2o.com/hydrotherapy-pools) Oct 07, 2026 Hydrotherapy pools face higher water quality risks than traditional commercial pools because warmer temperatures, longer user exposure, and vulnerable populations increase contamination and sanitizer demand. [![Pool Biofilm: What It Is and How to Get Rid of It](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/pool%20biofilm.jpg)](https://blog.poolsharkh2o.com/pool-biofilm) # [Pool Biofilm: What It Is and How to Get Rid of It](https://blog.poolsharkh2o.com/pool-biofilm) Sep 29, 2026 What is pool biofilm, and how do you get rid of it? Pool biofilm is a community of microorganisms that attaches to wet surfaces and becomes enclosed in a protective matrix. You can think of biofilm almost like a spiderweb for microbes: a sticky, protective structure that helps them attach to a surface and stay there. [![How Often Should You Change Cold Plunge Water?](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/how%20often%20should%20you%20change%20cold%20plunge%20water.jpg)](https://blog.poolsharkh2o.com/how-often-should-you-change-cold-plunge-water) # [How Often Should You Change Cold Plunge Water?](https://blog.poolsharkh2o.com/how-often-should-you-change-cold-plunge-water) Sep 29, 2026 For commercial gyms, health clubs, athletic facilities, and recovery centers, a cold plunge can see dozens of users in a single day–a number you’re likely still seeing increase, as cold plunge use has made the leap from niche wellness activity to mainstream. Since 2020, search interest for cold plunges has grown more than 400%, and the global cold plunge market is expected to reach $300 million... [![Cold Plunge Water Maintenance: An Overview for Commercial Facilities](https://blog.poolsharkh2o.com/hubfs/CTA%20and%20Popup%20Form%20Images/cold%20plunge%20water%20maintenance.png)](https://blog.poolsharkh2o.com/cold-plunge-water-maintenance) # [Cold Plunge Water Maintenance: An Overview for Commercial Facilities](https://blog.poolsharkh2o.com/cold-plunge-water-maintenance) Aug 24, 2026 Adding a cold plunge can be a valuable amenity for a gym, health club, athletic facility, or recovery center. But keeping that plunge ready for the next user requires more than clean-looking water and a functioning chiller. [![Chlorine for Cold Plunge: A Commercial Facility Guide to Water Chemistry and Maintenance](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/cold%20plunge%20pool%20maintenance.jpg)](https://blog.poolsharkh2o.com/chlorine-for-cold-plunge) # [Chlorine for Cold Plunge: A Commercial Facility Guide to Water Chemistry and Maintenance](https://blog.poolsharkh2o.com/chlorine-for-cold-plunge) Aug 11, 2026 Cold plunges have quickly become a popular amenity in gyms, health clubs, athletic facilities, recovery centers, and wellness spaces thanks to health benefits touted by influencers, athletes, and your health-focused neighbor. But unlike a traditional pool or spa, cold plunge systems operate in a unique environment that requires a different approach to maintenance and water chemistry management. [![Apartment Pool Maintenance: How Multifamily Teams Can Reduce Risk and Improve Pool Operations](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/Apartment%20Pool%20Maintenance.png)](https://blog.poolsharkh2o.com/apartment-pool-maintenance) # [Apartment Pool Maintenance: How Multifamily Teams Can Reduce Risk and Improve Pool Operations](https://blog.poolsharkh2o.com/apartment-pool-maintenance) Jul 22, 2026 Managing multifamily properties often means your teams are constantly being pulled in multiple directions. So it's no wonder if you find yourself wondering, how often do your apartment pools really need to be tested for water quality? [![Saltwater Pool Maintenance: What Commercial Pool Operators Need to Know](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/salt%20water%20pool%20maintenance.png)](https://blog.poolsharkh2o.com/saltwater-pool-maintenance) # [Saltwater Pool Maintenance: What Commercial Pool Operators Need to Know](https://blog.poolsharkh2o.com/saltwater-pool-maintenance) Jul 02, 2026 Quick Answer: Is Saltwater Pool Maintenance Easier for Commercial Pools? Saltwater pools still require regular testing, balancing, and preventative maintenance. While salt chlorine generators automate chlorine production, commercial operators must continue monitoring water chemistry, equipment performance, and salt cell condition to maintain safe swimming environments. [![How to Vacuum a Swimming Pool to Waste: Step-by-Step for Commercial and Public Pools](https://blog.poolsharkh2o.com/hubfs/Blog%20Images/vacuum%20to%20waste.png)](https://blog.poolsharkh2o.com/how-to-vacuum-a-swimming-pool-to-waste-step-by-step-for-commercial-and-public-pools) # [How to Vacuum a Swimming Pool to Waste: Step-by-Step for Commercial and Public Pools](https://blog.poolsharkh2o.com/how-to-vacuum-a-swimming-pool-to-waste-step-by-step-for-commercial-and-public-pools) Jun 02, 2026 Cloudy water, algae outbreaks, and heavy debris loads can quickly overwhelm a public commercial pool filtration system. In these situations, standard vacuuming may not be enough. When this is the case, vacuuming a pool “to waste” becomes an important maintenance strategy for commercial and public pool operators. 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