I have 1/4″ polyethylene tubing in my tent coming from a water line for my watering system. In the past week and a half, there have been 2 pin holes in it, flooding my 5×5 tent. What would cause this to happen? I have a 1000w hps. These pinholes have not been on a fitting or rubbing against anything, just in the middle of the line. Thanks in advance.