You don't want to use that wizard for your ATO. Use the Advanced mode and enter your ATO code by hand. It should look something like this:
Set OFF
If Switch1 CLOSED Then ON
If pH > 8.3 Then OFF
Defer 2:00 Then ON
Switch1 is your ATO float. Rename as necessary.
pH limit can be changed.
The Defer is just to keep the ATO from cycling ON/OFF if the float bounces due to water movement.