My leakshield seems to think there is a leak. I have deaerated the system, tested the fill level, and tried filling the tube up more, but don't want to add too much coolant to the system so there is enough air to maintain the negative pressure. The ULTITUBE 200 is about half full. I have flexible hosing (that seems to be getting squeezed due tot he vacuum the system creates), so keep the system on monitor instead of active. Can anyone assist and tell me how to fix the alarm going off all the tim...