The most common, yet hard-to-answer question, about spa ozonators is, "How can I tell if my spa ozonator's working?" Until now, there was no accurate way to tell.
DEL Ozone introduced the 9-0791-01 Ozone Test Kit in 2009. Finally, we have answers!
If your spa or hot tub is over five years old, chances are it is time to test and make sure your spa water is safe.