Even so, she has no idea how to actually remove the waste from the gravel. She takes too much into the tube and then swirls around the weakened vacuum, making a mess. You're supposed to push the siphon down into an area the size of the opening of the siphon, wiggle gently to remove the debris from the small sample you've got, then let it drop out clean and shift precisely to the next increment. She seems to lack a simple understanding of how to efficiently operate the device. And that's just one thing wrong with the video...