Quote Originally Posted by spibill View Post
I Want to make sure you noticed I have an UltraPure Uv Ozone generator also. Didn't know this and had no information from builder, but went online to get product info. It's a UPP25, good for up to 25,000g pools, generating 0.146 gm/hr. Seems a bit of an overkill, but will reduce chlorine need and extend the life of the SWCG.
The UV ozone generator will not do much for an outdoor pool, will not allow you to run a lower FC level, and might actually INCREASE your chlorine demand (the amount of chlorine needed to be generated to maintain a specific FC level) because ozone destroys chlorine and vice versa. You might find that you actually need to set the cell to a lower output percentage to maintain the same FC with the ozone off than on! YMMV and a lot depends on the amount of usage (and organics) in the water. Test strips are notorious for not being accurate for both CYA and TA so wait until you get your test kit but you DO need to get your CYA up to 80 ppm (and maintain your FC at 4-5 ppm) . This will help with the pH rise indirectly since ti will allow a lower output percentage to maintain the FC level and that means less cell on time which mean less generation of hydrogen bubbles in the cell which means less outgassing of CO2 from that source of aeration which means slower pH rise.