Ozone and UV are not designed to eliminate the use of chlorine, but rather enhance its effectiveness. IOW, the use of either, or both is so you can use less Cl.
That's the theory anyway...
Something to consider when deciding whether or not the unit is being effective with regard to sanitizing your water. If you are running the Cl level in your pool at the recommendation set forth by the Ozone/UV manufacturer, You should gradually find it more and more difficult to maintain the clarity as the bulb begins to loose its effectiveness. This can be an indicator of when the bulb needs changing. In a perfect world, you would be changing the bulb when it is dimmer rather than when it actually goes dark (If i remember, Paramount says around 18 months).
So the question is, Are you saving a least $90.00 in Chlorine costs over the course of around 18 months?
Keep in mind that, If you are running your Cl levels at say, what your test kit recommends, you may not see any noticeable effect of the O3 unit. Because that recommendation is not taking the Ozone/UV into account.
Agreed, this system is problematic in that the bulbs effectiveness changes as it ages, and eventually becomes ineffective, and if its in the middle of the season, you could quickly loose the pool if not caught in time. That's why weekly pool services generally ignore this system, and dose the pool as if there was no unit connected.
