As BigDave explained, ozone is pretty useless on outdoor pools. There is an extremely long current thread in the the "China Shop" section of the forum, if you really want to dig into the details.

Worse, some ozone systems can damage concrete pools like yours, by introducing a constant source of aeration, which usually ends up stripping the alkalinity and resulting in plaster erosion. So . . .

1. Turn the ozone unit off.

2. Get a local OTO / phenol red (yellow / red) drops kit.

3. Use 8% household bleach to raise chlorine to adequate (>2 ppm) levels. Adjust pH to between 7 and 8. Borax RAISES pH; muriatic acid lowers it. See http://pool9.net/borax/ & http://pool9.net/muriatic/. Learn to maintain your pool this way. This method will ALWAYS work, regardless of your pump, your other equipment, etc. You probably will NOT use this method, permanently, or at least not bleach alone. But you can ALWAYS maintain your pool this way, and that's not true of any other method. To put it another way, this will always be your 'fall-back' method of treatment.

4. As Dave said, ORDER a K2006 and learn to use it. Be sure to watch the videos. http://pool9.net/tk/ Once you have a K2006 and have tested your pool, post the results and we can move to the next level. Be WARNED: you can NOT trust pool store testing. Maybe 1 in 25 stores test accurately. They have NO reason to care about accurate testing, since inaccurate testing (as long as you don't know) sells more chemicals!

5. If you REALLY want to mess with ozone, check out the thread I mentioned.

Good luck!

( membership upgraded.)