I just recieved my overflow box in the mail and after checking it out, I have a question. Everyone seems to be concerned about the sump overflowing if the power fails, but noone seems to mention what will happen if the power fails and the siphon is broken in the overflow box then the power comes back on and the sump gets pumped back into the tank. I think Melev answered this question for me saying that the siphon shouldn't break even when the pump stops. The box that I got has a siphon tube from one box to the next and if the pump stops from the sump, then the siphon will empty the box in the tank and thus the siphon will break! If the power comes back on the entire sump will pump back into the tank and overflow the tank. Am I missing something or am I correct?