Pool Chemistry Cheat Sheet: Your Essential Guide

Team FMM

Nov 26, 2025

Managing pool water chemistry doesn’t have to be overwhelming. The Family Pool Maintenance team has compiled a helpful pool chemistry cheat sheet that breaks down the pool maintenance process into key steps you can follow easily. This guide will help you keep your pool safe, clean, and inviting.

Essential Numbers Every Pool Owner Needs

Your swimming pool speaks through numbers. Keep this pool chemistry cheat sheet handy to track the key measurements.

  • The numbers start with the pH level, which should stay between 7.2 and 7.6.
  • Chlorine works best between 1-3 parts per million (ppm)
  • Alkalinity needs to remain within 80-120 ppm.
  • For long-term stability, maintain calcium hardness at 200-400 ppm
  • Keep cyanuric acid (CYA) between 30-80 ppm.

Testing Simplified

Testing your pool’s water chemistry doesn’t need to be a time-consuming chore. Reference your pool chemistry cheat sheet and test your water twice weekly during swimming season. Follow these quick steps:

  1. Collect water from 18 inches below the surface
  2. Check pH and chlorine levels first
  3. Test alkalinity weekly
  4. Measure calcium hardness monthly
  5. Check CYA levels monthly during peak season

The pH Priority

pH is critical to maintaining balance in your pool. Low pH can corrode equipment, while high pH reduces chlorine’s effectiveness. Signs your pH needs adjustment include:

  • Burning eyes or itchy skin.
  • Cloudy water or greenish tints.
  • Scale buildup on surfaces.
  • Faster wear on pool equipment.

Address pH issues promptly to prevent further problems.

Chlorine Basics

Chlorine safeguards swimmers, but its levels can fluctuate due to several factors. Swimming activity, weather conditions, and seasonal shifts all affect chlorine demand. Recent rainfall or increased debris can quickly deplete chlorine levels. When chlorine runs low, an evening shock treatment brings levels back up. High chlorine requires patience - wait 24 hours, then test again. If levels keep swinging, check your CYA and adjust accordingly.

Balancing Act: Total Alkalinity

Think of alkalinity as your pH buffer. Without proper alkalinity, your pH bounces all over. Low alkalinity lets pH swing wildly throughout the day while high alkalinity locks pH at elevated levels. When alkalinity sits just right, pH remains stable, making your pool easier to maintain. Keep your pool chemistry cheat sheet nearby to monitor these crucial levels.

Weather Effects

Delaware weather affects pool chemistry in several important ways:

  • Heavy rains dilute your carefully balanced chemicals.
  • Hot, sunny days burn through chlorine faster than usual.
  • Storm systems bring extra debris into your pool, increasing chemical demands.
  • Even temperature swings change how actively your chemicals work in the water.

Daily Pool Check

Start your day with a quick pool review:

  1. Ensure the water is clear
  2. Check skimmer basket
  3. Review pump operation
  4. Confirm proper water levels
  5. Smell for proper chlorine level

Seasonal Adjustments

Your pool’s chemical needs shift with Delaware’s seasons: When Spring comes around, gradually increase chemical levels and test more frequently when opening your pool. Watch for pollen accumulation. During the Summer, monitor chlorine closely and test at least twice weekly, adjusting for usage and weather. In the Fall, it's important to maintain stable chemical levels while preparing for winterizing.

Emergency Fixes

Pool problems need quick solutions. Keep your pool chemistry cheat sheet posted near your equipment for quick reference during emergencies:

  • Cloudy water typically means checking filtration and boosting chlorine levels.
  • Green water demands immediate shock treatment with 24-hour filter operation.
  • A strong chlorine smell indicates too little free chlorine in your pool.
  • Scale deposits mean it's time to balance both pH and hardness levels.

Save Money with Smart Maintenance

Smart chemistry saves serious money over time. Regular testing reduces the risks of wasting chemicals through overuse. Proper storage extends the life of your pool supplies. Well-balanced water reduces wear and tear on expensive equipment. Prevention always costs less than fixing problems after they develop.

Professional Support When You Need It

With over 20 years of experience, Family Pool Maintenance offers a range of services to simplify your pool care:

  • Comprehensive water testing and analysis.
  • Custom treatment plans tailored to your pool.
  • Emergency assistance for unexpected issues.
  • Seasonal maintenance programs for worry-free pool care.

Free Resources

We encourage you to print a copy of our pool chemistry cheat sheet for your pool shed. This handy resource tracks ideal chemical ranges, testing schedules, and solutions for common problems. We've included our emergency contact information for immediate support when needed.

Get Started Today

Contact Family Pool Maintenance today for your free chemistry consultation and personalized pool chemistry cheat sheet. We proudly serve Dover, Smyrna, Townsend, and Middletown with expert pool care.

Pool Chemistry Quick Reference Guide

By Family Pool Maintenance

Essential Levels

┌─────────────────┬────────────────────┐│ Measurement │ Ideal Range │├─────────────────┼────────────────────┤│ pH │ 7.2 - 7.6 ││ Chlorine │ 1-3 ppm ││ Alkalinity │ 80-120 ppm ││ Calcium │ 200-400 ppm ││ Cyanuric Acid │ 30-80 ppm │└─────────────────┴────────────────────┘

Testing Schedule

  • Daily: Visual check
  • 2x Weekly: pH & chlorine
  • Weekly: Alkalinity
  • Monthly: Calcium & CYA

Quick Solutions

  1. Cloudy Water
    • Check filter
    • Test chlorine
    • Run pump 24 hrs
  2. Green Water
    • Shock immediately
    • Brush walls
    • Filter continuously
  3. Strong Chlorine Smell
    • Add chlorine
    • Test free chlorine
    • Check pH

Emergency Contacts

Family Pool Maintenance

Seasonal Notes

🌱 Spring: Open pool, gradual chemical increase ☀️ Summer: Regular testing, adjust for use 🍂 Fall: Maintain levels, prepare for closing[Keep this sheet in your pool shed for quick reference]