Thank you for the suggest JohnRob. I actually ditched the library in favor of just using the SoftwareSerial.h library. 
The sensor reads like so: value1 (sensor turns on, always 255), value 2 (receiver received nothing so its always 0), value 3 and 4 seem to be the accurate measurements of the water.
I'm not sure how I can create a line of code to only accept the last 2 values. Should I create a for loop counter that collects the value whenever i=3, or is there a better way to do that?