I am using io salt. I tested my ALK and got 11.2 the other day. But I am planning to do a full all,call, and mag test to start dosing if needed. My question is this. Do I count the amount of liquid used to turn water blue as part of the ml used. Or do you turn the tank water blue then count the amount of ml after the tank water is blue? I just want the most accurate test to see if I need any dosing yet.