have a Sunbelt Swim Spa, but having surging sounds coming from the hot tub side of spa. Will do this from time to time. What causes it? and how do I fix it? system is a balboa 2000LE M-7 power pack. Also our swim spa has a mazzeii ozone injector jet, balboa ozone. What exactly are these and is there away to know if they are working? Thanks for your help, as I am just trying to learn about this spa. Seems like a class on how to run this spa would be nice. Thanks again.

Surging sounds are generally from a dirty filter or a low water level. Look at your filter with the jets running (if it's a top loading filter) - is the water level going below the filter? If so it will be sucking air and surging. If the water is above the filter then try pulling out the filter and turning on the jets. If it doesn't surge you have a dirty filter. Soak it overnight in a filter cleaner. use this advice at your own risk Pete http://www.makesmeshutter.com http://www.floridahotspring.com