Yes, more for the first few days and much less after two weeks. A higher water level is the most helpful. In general I prefer at least 6" of water to 10" less bubbles this way and the pump cannot run dry so easily as there is a safety margin. It also helps to aim the hole in the back where water escapes at a solid surface (sump wall). Make sure water exits the stand pipe, just a slow trickle and within a couple days it should be skimming.