Hey all, how about a skimmer discussion. I usually kept my skimmer submersed at about 7" of water depth (recommended at 6-10"). At this depth the skimmer pulls air in strong and has to "work" to get the air/water ratio through the skimming column. I felt my skimming was adequate and efficient at this height. Recently I have arranged my sump and moved the skimmer into about 10" of water depth. Changes I have seen are that the skimmer does not have to work as hard and I have less precise control over the water height in the chamber. I have not had this setup long enough to determine if it is more or less effective. What are your experiences and personal observations on this matter?