Surge protectors help protect whatever equipment you have plugged into them from "surges." A surge, or transient voltage, occurs when there is an increase in voltage significantly above the designated level in a flow of electricity. It's only a surge if it lasts 3 nanoseconds or more, otherwise it's called a spike. Surges can be caused by different things including lightning, high-power electrical devices, and faulty wiring among other things. A surge may or may not be severe enough to damage your equipment, but it's not worth the risk. A surge protector is necessary because newer electronic devices have smaller and more delicate components than their counterparts and can be more easily damaged by a surge. When it comes to choosing a surge protector, it's best to look into what kind will best fit your needs, or talk to your pool electrician. They should be able to tell you exactly what kind you need. Check out PoguePoolSpa.com for more pool & spa related blogs.