Simplicity 120 DC Skimmer in SUMP with DC pumpSimple. Effective. Affordable. You are going to love Simplicity DC Skimmers. Our skimmers use a controllable DC pump and needle wheel; regarded as one of the best methods to shred air and water to create micro fine bubbles. Our skimmers provide one of the keys to a successful protein skimming: long contact time between water and air. The bubble plate, wedge pipe indicator, air intake adjustment and controllable pump allow you to achieve the best