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 How to Test your Swimming Pool Water Read More » Swimming Pool Volume Calculator Read More » How to Clear Cloudy Swimming Pool Water Read More » What are Free Chlorine, Combined Chlorine, and Total Chlorine? Read More » Saltwater vs. Chlorine Sanitation Pros and Cons for Swimming Pools Read More » Swimming Pool Algae: What it is and How to Remove It Read More » How to Test, Raise, and Lower Swimming Pool Alkalinity Read More » What is Swimming Pool Alkalinity? Read More » The Relationship Between pH and Total Alkalinity Read More » « Previous Next » Top Posts Buying Guide for the Best Pool Shock Read More » Buying Guide for the Best Pool Algaecide Read More » The Facts About Pool Algaecide Read More » Why You Need A Salt Chlorine Generator Read More » « Previous Next »