I have a digital pool pilot dig 220 model 60 - I do not have the ORP option - but the displays alternation between off - on -ORP ..... the unit is about 3 years old and this is the first time I have seen the ORP displayed.
NOt sure why.....
45000 gal - in ground - vinyal
NOt sure why.....
45000 gal - in ground - vinyal