@Radio shack, it works to about $9 for 75 feet.
The HC-SR04 sensor is roughly about 12 feet from the Arduino. There are about 4 wires that need to be hooked up between the HC-SR04 and the Arduino. That takes almost the entire bundle of $9 to connect the sensor to the Arduino.
The Arduino is at a distance as it needs to control two large aquariums.
Is there any other way to avoid this cost?