While I am doing po4 I am also doing alk and no3. Where is the time saving.The fact that you can only do 1 at a time is a deal breaker. 3 minutes for PO4 and 7 minutes for NO3. I do NO3 first and then PO4 while NO3 is testing. If it's faster I might think about it, but I have had to redo tests enough times as it is because I missed a timer. That has no longer an issue with the times now.
on the other hand I understand but might be wrong you can program your own test.
The benefit we are sure about is logging over separate tests