I bought a room ultrasonic humidifier, but when I went to get the PVC supplies to hook it up, I got stuck. The opeing on the humidifier is 2 1/2 inches on the top and gets smaller down the opening. I could only find reducers at Home Depot that go from 1" to 3/4". What do you guys stick in the humidifier and how do you reduce it to a smaller tube? There is a long piece of plastic about 5 inches long and 1" wide. Can I break that or is it needed?