Taking proper care of your pool heater means fewer issues, less maintenance and, ultimately, less money in the long term. Here are some useful tips to protect your pool heater:
Keep the pool chemistry balanced (pH between 7.2 and 7.8, chlorine up to 10ppm)
Make sure to closely follow installation instructions (or have a professional install it)
Make sure the metal casing is electrically bonded (prevents shocks and short circuits)
Prevent any backflow into the heater (install a safety valve after the heater)
Make sure the pool pump has sufficient power to provide a good flow