Piece of junk!
This item is a total piece of junk! Worst is that the unit doesn't have a good enough lock, and even a slight bump makes it fall apart and water sprays everywhere! I've ducked taped it shut, but then with it sucking up the occasional rock (way too often), the fan rotor jams and I have to take it all apart again!  Note, this does NOT work well in 5-10 gallon aquariums, as the minimum water level is so high that you have to tilt the rod, then you don't have enough room to do sufficient cleaning!  Don't buy this, you are wasting your time. I wish I could get my money back!
Rating: 1 stars