Pool and Spa Maintenance Made Easy. Pool Calculator provides the necessary tools and pool maintenance info you need to keep your swimming pool & hot tub water clear and balanced. USE CALCULATOR Maintenance Chemistry Equipment Troubleshoot Salt Pools Hot Tubs Product Guide Download the App! Learn about caring for your pool or hot tub Maintenance Chemistry Troubleshooting Equipment Salt Pools Hot Tubs Product Guide How to Clean and Maintain Your Swimming Pool or Hot Tub Search Maintenance Chemistry Equipment Troubleshoot Salt Pools Hot Tubs Product Guide What Should pH levels be in Swimming Pools and Hot Tubs? Read More » How to Test your Swimming Pool Water Read More » The Relationship Between pH and Total Alkalinity Read More » What is Swimming Pool Alkalinity? Read More » How to Test, Raise, and Lower Swimming Pool Alkalinity Read More » Swimming Pool Algae: What it is and How to Remove It Read More » Saltwater vs. Chlorine Sanitation Pros and Cons for Swimming Pools Read More » What are Free Chlorine, Combined Chlorine, and Total Chlorine? Read More » How to Clear Cloudy Swimming Pool Water Read More » « Previous Next » Top Posts Muriatic Acid: Pool Owners Guide Read More » The Difference Between Pool Clarifier and Flocculant Read More » Salt Water Pool Conversion Guide Read More » Green Hair from Chlorine & How to Fix It Read More » « Previous Next »