Oh. Okay. I thought the set did start it up. Anyway, that's great to know about the midnight kind of synchronization(sic). Everything is doing fine today :fish2: I plan to test tomorrow. I'm so thankful that you were on last night because I was really worried when the doser just kept running:worried2: I definitely don't need LC flowing freely in the tank or dropping the PO too quickly. So "Thank You" again for your help and the good information:thumbsup: I sure hope everything goes great with this dosing....