| Problem | Likely Cause | The Fix | |--------|-------------|----------| | | Low chlorine, high pH, or algae | Shock treat, brush pool, run pump 24h, adjust pH to 7.2 | | Strong chlorine smell | High combined chloramines (not enough free chlorine) | Super-shock the pool | | Eye/skin irritation | pH too low or too high | Adjust pH to 7.4–7.6 | | Scale on tile/equipment | High calcium or high pH | Lower pH, add scale inhibitor | | Metal stains (brown/green) | Iron, copper, or manganese in water | Use a metal sequestrant |
Calcium hardness is the final pillar of chemical maintenance. If levels are too low, the water becomes "hungry" and will leach calcium from your pool’s plaster or tile grout. If levels are too high, you will see scaly white deposits on your pool walls and plumbing. Aim for a range of 200 to 400 ppm to keep your surfaces smooth and your pipes clear. Seasonal Adjustments and Safety pool chemical maintenance
If you’ve followed all steps and your water remains cloudy, algae keeps returning, or test readings are wildly unstable (e.g., chlorine drops to zero overnight), it’s time to call a pool service. You may have a filtration problem, a hidden contaminant, or a need for partial drain-and-refill. | Problem | Likely Cause | The Fix
The most important step in maintenance is regular testing. You cannot manage what you do not measure. Most pool owners should use liquid test kits or professional-grade strips at least two to three times per week. During periods of heavy use or extreme heat, daily testing is recommended. Aim for a range of 200 to 400
Consistency is key. Set aside 15 minutes every week for the following steps:
If you adjust out of sequence, you’ll waste chemicals and never achieve balance.